JPH0242428A - Camera system - Google Patents

Abstract

PURPOSE:To attain a release action in which the intention of a photographer is respected as much as possible by operating a release without operating a release inhibition when a lens driving stop is operated in an automatic focus control mode which inhibits the release until focused. CONSTITUTION:A lens is driven so as to bring a subject into focus by the result of the decision of out-of-focus or in-focus by a focus detecting means M1 and a release inhibiting means 4 inhibits the release until the subject is brought into focus by this lens driving even though a release switch RSW is operated to release a shutter. When, however, an operator operates a lens driving stop operating means M5 to stop the lens driving, the release inhibiting means M4 is not operated and the action of a releasing means M3 is permitted. Thus, by operating the release switch RSW at an arbitrary point of time, the operator can release the shutter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to camera systems, and more particularly to automatic focus control systems thereof.

The automatic focus control (AF) function that drives the lens so that the subject is properly focused is already known, but this A
Various operating modes are also considered for the F function. For example, one-shot AF mode that stops the lens from driving once the subject is in focus, or - the lens that keeps the subject in focus even after the subject is in focus. Continuous AF continues to drive
There are modes etc. Japanese Patent Laid-Open No. 58-140724 discloses a system in which each of these AF modes and manual focus (manual focusing) mode can be switched by a switch provided on the lens. Further, a technique for locking the focus using a switch provided on the lens side is disclosed in Japanese Utility Model Application No. 58-62310.

Prohibiting the shutter release until focus is achieved when the camera is in the desired AF mode may go against the photographer's intention in some cases, and has become an inconvenient mechanism for the photographer.

The present invention solves these problems and provides a camera system that enables a release operation that respects the photographer's intentions as much as possible.

In order to achieve the above object, the camera system of the present invention, as shown in FIG. a lens driving means M2 that drives the lens so that the subject is in focus according to the
A release means M3 that releases the shutter in response to the operation of W, and a release prohibition means M that prohibits the operation of the release means M3 until the focus detection means M1 determines that the camera is in focus.
4, a lens drive stop operation means M5 for stopping the lens drive by the lens drive means M2, and when the lens drive stop operation means M5 is operated, the release inhibiting means M4 is not activated and the release means old is activated. It is characterized by comprising a release means M6 for causing the

Further, it is convenient if the lens drive stop operation means M5 is a switch provided on the lens side.

The lens driving means M2 drives the lens so that the object is in focus, according to the determination result of the focus detection means M1 as to whether the object is out of focus (the object is not in focus) or in focus (the object is in focus). drive Normally, until the subject is brought into focus by this lens drive, even if the operator presses the release switch R3
Even if I try to release the shutter by operating W,
A release inhibiting means M4 inhibits the release operation.

On the other hand, if the operator stops the lens drive by operating the lens drive stop operation means M5, it is interpreted that the operator's intention is that the focusing operation is sufficient. , the release prohibition means M4 is deactivated and the operation of the release means M3 is permitted. This allows the operator to release the release switch R3 at any time.
By operating W, the shutter can be released.

(Left space below) Figure 1 is a circuit block diagram of the camera of this embodiment. In the figure, (μC) is the control of the entire camera.

A microcomputer (hereinafter referred to as a "microcomputer") that performs various calculations has an E2FROM, and internal writing and reading can be performed freely. (AFct) is a focus detection circuit that performs focus detection, and is COD.

Consisting of an integral control circuit and an A/D conversion circuit, it obtains object information for three distance measurement areas (to be described later), performs A/D conversion on this information, and outputs it to a microcomputer (μC). (LD
I) is an auxiliary light emitting element that emits light toward a subject to enable focus detection when the brightness is low and focus cannot be detected.

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (DISPC) is a display control circuit which inputs display data and display control signals from a microcomputer (μC) and causes a display section (DISP+) on the top surface of the camera body and a display section (DISh+) in the viewfinder to perform a predetermined display.

In this example, there are two types of IC cards: a mode setting card that sets the camera mode and a program card that determines exposure. Only one of these cards can be installed in the camera, and the camera will control specific modes, exposure programs, and functions. This will be explained in detail later. (ST) is an electronic flash device, (IF) is a camera microcomputer (μC)
) and an electronic flash device (ST), the (STC) receives the reflected light from the subject when the flash is fired, which has passed through the photographic lens (not shown), and fires the flash when the appropriate exposure amount is reached. This is a dimming circuit that stops light emission.

(LE) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera.

(LECN) is a lens drive control circuit that drives the photographing lens based on focus detection information, (Tvct) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC), and (Avct) is a microcomputer (μC).
The aperture control circuit t' (MD) that controls the aperture based on the control signal from the microcomputer (μC) is a motor control circuit that controls the winding and rewinding of the film based on the control signal from the microcomputer (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is the battery that serves as the power source, (D+) is the diode for backflow prevention, and (Cau) is the backup capacitor for the microcomputer (μC), which has a large capacity. (RR) (CR) is a microcomputer (μC) when the battery is installed.
This is a reset resistor and capacitor for applying reset. (Tri) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (SRE) is a battery installation switch that turns off when the battery is installed, and when the battery is installed and the switch (SRE) turns off, the microcontroller (μC) A signal changing from "L" level to "rH" level is applied to the terminal (RE) of the microcomputer (
μC) will execute a reset routine to be described later. (SEM) is a normally open exposure mode change switch, and the exposure mode is changed by operating this switch (SEM) and operating the up switch (Sup) and down switch (Sdn), which will be described later. (SFON) is a normally open function change switch, and functions are changed (for example, switching between continuous shooting and single shooting) by operating this switch, up switch (Sup), and down switch (Sdn).

(SCD) normally switches the card function between disabled and enabled when the card is installed, and if the mode setting card is installed and the data setting mode is selected, the changed data item is selected. This is a normally open card function enable/disable switch. In addition, up switch (Sup)
, the setting value in the item can be set by operating the down switch (Sdn). (Details will be explained later).

(S CD5) is a normally open card data setting switch that is operated when changing the mode setting or setting data necessary for the function when a mode setting card or function card (program card) is installed. be.

(SO) is a photometry switch that is operated to perform camera operations (for example, photometry and display of various data) other than autofocus (hereinafter referred to as rAFJ) operation, and can be turned on by simply touching the release button (not shown). It consists of a touch switch. The above switch (SEM)
(S FON) (S CD) (S CD5) (S 0)
(7) If one of the switches is turned on, the microcomputer (
μC) executes the interrupt flow (INTI) in FIG. 3, which will be described later. (31) is an AF switch that starts the AF operation, and is turned on when the first stroke of the release button is pressed. (S2) is a release switch that is operated when performing a photographing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (SWD) is turned on when the film is wound for one frame.
It's Koma Switch. (SAEL) is a switch for performing AE lock (exposure lock), and is composed of a normally open button switch. (SAF/M) is a focus adjustment mode changeover switch for switching between AF and manual focus adjustment.

(381!:) is a permanently open change data selection switch for selecting data to be changed. (SSELF) is a self-mode switch operated when taking self-photographs. (SAv) is an aperture change switch that changes the aperture value by operating this switch and operating the up switch or down switch when the exposure mode is M mode (manual mode). When there is no operation in M mode, the shutter speed is changed by operating the up switch or down switch. (SFLM) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present.

(SRC) is a back cover close detection switch that turns ON when the back cover is closed and turns OFF when it is opened. When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (S RW) is a switch to start film rewinding. When operated, it turns ON, executes the interrupt routine described below, and turns ON when the back cover is opened.
FF. (SCR) is an IC card installation switch that turns OFF when an IC card (CD) is installed.
When the IC card (CD) is turned off, the microcomputer (
μC2) is reset. (X) is a so-called X contact, which is connected to GND when the shutter completes one curtain run, and is turned off along with charging of a release member (not shown).

(Sup) is an up switch for switching or adding data to be changed, and Sup (Sdn) is a down switch for subtracting data. When changing the aperture value in M mode, turn on the aperture change switch (S Av) and (
Increase the aperture value by operating S up) and (S dn).

down, turn off the aperture change switch (S up),
(S dn) functions to increase and decrease the shutter speed, respectively. However, the aperture change switch (S Av) can be turned off by changing the function using the IC card described later.
to change the aperture, and turn on the aperture change switch (SAv) to change the shutter speed. Up switch (Sup
), the operation of the down switch (Sdn) is detected when the terminals (IP20) and (IP21) each become "L" level. In FIG. 1, a line (WI) common to each of the switches is connected to a ground potential point (GND).

Table 1 summarizes the above-mentioned switches and their functions.

Next, before explaining the operation of the camera of this embodiment, two types of IC cards used in 22, namely a mode setting card and a program card, will be explained.

(I) Mode setting card: This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are considered unnecessary), or to select an alternative function. By doing so, we aim to provide a camera that meets the photographer's intentions and photographic techniques. Additionally, unnecessary functions can be omitted, resulting in a camera that is simplified and has good operability when changing modes. Next, the explanation regarding this card and the display contents performed for it will be explained.

First, to select the functions of this IC card, (i) 4
(ii) selection of exposure mode;

(iii) Selection of AE amount-related functions, (iv) Choice of two functions, and (v) Relationship based on operation of a switch on the lens side.

The four functions in (i) above are (a-1) Highlight reference/shadow reference exposure function (a-2) Exposure compensation function (a-3) Film advance mode switching function (continuous shooting/single shooting) (a-4) Spot AF/multi-point AF switching function, which allows the photographer to select the function necessary for the photographer. The display on the display section (DISP+) on the camera body regarding this selection is prepared as shown in FIG. 2(b) out of all the display contents shown in FIG. 2(a). In FIG. 2(b), the functions (a-1) to (a-4) described above correspond in order from the left side.

If the photographer does not require only the highlight reference/shadow reference exposure function (a-1), a display as shown in FIG. 2(C) is displayed.

For each selected function, the display regarding the use or switching of that function is as follows: Highlight criteria: Figure 2 (d) Shadow criteria: Figure 2 (e) Exposure compensation + side...
...Fig. 2 (f) Exposure compensation - side...Fig. 2 (g) Continuous shooting mode...Fig. 2 (h
)Single shooting mode......Figure 2 (i) Spot AF......Figure 2 (j) Multi-point A
F......Figure 2 (k). As an exception, in the case of multi-point/spot selection by the program or spot selection by the switch (SQ) described below, the mode set by the above two is displayed only when it is selected, even if it is not selectable. be done. Note that regarding continuous shooting/single shooting and spot AF/multi-point AF, even if one of the functions (for example, continuous shooting) cannot be switched, it is always selected. However, since switching is not possible, it is not displayed.

The display in FIG. 2 (1) shows that the exposure compensation function and the film winding mode switching function are selected, and that the exposure compensation + side and single shooting mode are controlled.

When setting, use the numbers "0" to "15" shown in Table 2 (a).
In order to show that the function is provided only for the function given to
0''], Figure 2 (c) Only CH/8 function without 9
[equivalent to number 8] will be displayed, and the up switch,
It is designed to advance one step at a time by operating the down switch.

Next, the exposure modes related to the exposure mode selection in (ii) above are (b-1) Program mode (P mode) (b-
2) Aperture priority mode (A mode) (b-a)
Manual mode (M mode) (b-4) There is a shutter priority mode (S mode), P mode is always set as a basic, and you can select a combination of the remaining three modes (A, M, S mode). There is. Therefore, there are eight combinations as shown in the table on the next page, and among the four modes shown in Figure 2 (m) (however, PROGRAM is represented by P), the selected one is selected when setting the mode. For example, the display of combinations is shown in Figure 2 (n
), and one selected exposure mode is displayed at the time of photographing [FIG. 2(o) (A mode selection)].

Incidentally, in the P mode, PROGRAM is displayed [Fig. 2 (p)].

Next, as for the selection of the AE amount related function in (iii) above,
There are the following:

(C-1) A E lock button relationship (1) While pressing the AE lock button, the power of the camera is maintained in the AE lock state. (2) When the AE lock button is pressed once, the AE log button is pressed again in the AE lock state. Or AE with power hold OFF
Release the lock state (C-2) Set shutter speed to 1/
Make it 2Ev.

This allows the set shutter speed, which normally changes only in increments of IEv, to be set in increments of 172Ev.

(C-3) When the exposure mode is M mode, the aperture change switch (SAv) remains OFF and the aperture value can be changed by simply operating the up switch or down switch.
Av) operation (i.e. ON) to change the shutter speed (hereinafter referred to as rM2 mode), or ■ change the shutter speed with the aperture change switch (SAv) OFF,
When used together with the operation (ie, ON) of the aperture change switch (SAv), the mode (hereinafter referred to as rM1 mode) in which the aperture value is changed is switched.

When setting these functions, the display will be as shown in Figure 2 (v), where rF-5, indicates a change in this mode, and the number "2" indicates the functions shown in Table 2 (e), respectively. Indicates selection.

Next, (iv) as a choice between the two functions, (d-1) forward counting or subtraction of the film counter, (d-2) presence or absence of auto-return at the end of the film, and (d-3) rewinding. At the end, part of the film leader is rolled into the cartridge or left outside the cartridge (d-4) With or without a camera shake warning buzzer (BZ), there are 16 possible combinations, as shown in Table 2 (b). Numbers are given for the combinations shown. At the time of setting, the screen is displayed as shown in FIG. 2(q), with the last three digits of the shutter speed indicating the item to be changed, and the film counter indicating the items below that.

(v) Regarding the operation of the lens-side switch, it is related to which AF (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. The modes are: - First, when the switch is not operated (AF mode selected), (E-1) One-shot AF (follow-up judgment after focus) in a multi-point/spot area (however, program mode ) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AF It is displayed as shown in Figure 2 (r).

In the same figure, rF-24 is the lens side switch (SQ) (
(see Figure 36), and "3" indicates the mode (see Figure 36).
continuous AF). The selection numbers and functions are shown in Table 2 (C).

The mode setting card also has the following functions (vi) and (vii).

(vi) Self-timer time setting The waiting time in morph mode can be changed, for example, to 2 seconds, 5 seconds, or 10 seconds. The display in this case is shown in Figure 2 (S).
rF-3J indicates the self-time setting, and "1" indicates the setting seconds (5 seconds).The selection numbers and functions are shown in Table 2 (d).

(vii) A E level change This is to always correct the exposure level of the camera by a certain amount.The setting level is +0.5.
+0.25. O, -0, 25, -0, 5 (Ev), and the selection numbers are 0 to 4 from the left (no table)
It is attached. The display is shown in FIG. 2 (1),
rF-4J is AE level change mode, "3" is r +
It shows that 0.25EVJ has been changed. In addition, in (i) to (vii) above, by turning on the card key once when setting the mode, (i) to (vii)
mode is selected persistently, and a function (setting value) within that mode is selected by pressing the up switch or down switch. Each of the modes (i) to (vii) and functions can be set cyclically.

(II) Program card: A program card is used to control exposure programs and various camera controls, which are designed to take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake. (Details will be explained later).

Next, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (SRE
) turns OFF, a signal changing from rI, J level to "H" level is input to the terminal (RR), the built-in clock starts oscillating, and the clock is also applied to the IC card (CD) via the terminal (φ). Sent from the microcomputer (μC).

The microcomputer (μC) is shown in Figure 3 (RESET
Execute routine I. In this routine, the microcomputer (μC) first performs an initial setting based on the fact that the battery has been installed (#5). This subroutine is shown in FIG.

In FIG. 4, the microcomputer (μC) prohibits all interrupts to this flow and sets all output terminals to the "L" level. Also, reset all the flags in the RAM [Table 8 (described later)] and RAM (registers), and set the flag (BATF) indicating when the battery is installed (#100 to #1
10). This allows you to change the exposure mode to P mode, spot/
Multi-point AF mode, single shooting (S)/continuous shooting (C), single shooting (S) mode, no exposure compensation, highlights (H)/shadows (S), and one-shot AF ,F
The ul1 non-flash mode, forced non-flash mode, and multi-point photometry mode are set. The contents of this functional data are shown in Table 3.

Next, it is detected whether the mode setting card of the two types of IC cards mentioned above has been inserted at least once and the mode setting has already been performed by checking the contents of the E2PROM (the contents of MSb4, which will be described later). Then, if it is not the setting method, disable interrupts other than interrupts caused by IC card insertion (CDINT) and return (#135, #140)
. In the mode setting method, which mode is set is checked from the contents of the E2FROM (contents of MSbO to MSb3, which will be described later), and the part where the changed data is to be displayed is determined. Highlight/shadow mode (H/S mode), exposure compensation mode (+/- mode), single shot/continuous shooting switching mode (S/C mode), spot/multi-point AF switching mode (S/A mode) Detect whether a mode is set in the head, and if it is set, set the change data for the first mode set 6 (#145 to 918
2). The RAM change data, E2PROM (7), and setting mode data are shown in Tables 4 and 5. Note that the steps (#145 to #182) correspond to determining the position of a cursor, which will be described later, in terms of display.

Next, in order to display these setting modes, control is performed to send data to a display control circuit (DISPC).

First, set the terminal (C3DISP) to the "H" level, notify the display control circuit (DISPC) of data communication, create data (see Table 9), perform serial communication, and when the data transfer is completed, the terminal ( C3DISP) to "L" level, and the display control circuit (DISPC) indicates the end of serial communication.
) (#185 to #20).

To briefly explain the operation in the case of serial communication, first, a clock signal is output from the serial clock terminal (SCK) in response to a serial communication command. The output side outputs one bit of data in synchronization with the rising edge of this clock, and the input side inputs one bit of data in synchronization with the falling edge of the clock. By doing this as many times as necessary, the necessary data can be obtained. An example of a display in a normal photographing state is shown in FIG. 2(u).

In the example of Fig. 2 (U), the displayed contents include shutter speed [:1000), aperture value [:5.6),
AE mode [PROGRAM], number of films (
with or without film) [17], focus mode (ONE
5HOT AF) and function mode (shape shown on the bottom line). These display data are shown in Table 9 (explanation will be made according to sequence-based display control). The display data here is the AE mode selected by the IC card (CD) in bits b2 to b4 of address (03H), and bits bo-b4 of address (04H).
Whether mode setting is possible using the b7 IC card (CD),
Bits b4 to b7 of address (08H), bits bO to b7 of (09H) by IC card (CD) (iv
) to (vii) The selection numbers set in the change modes are read from the E2FROM and set in each address.

In addition, the data in the data change display (bo at address 05H)
-b2), when battery is installed (OAH b4 = 1) (OA)
b1-b3 of I. b5. b6 = O) at each address. The display control circuit (DISPC) receives the battery installation signal and outputs E2 at 0.5 second intervals.
34th according to the function data set in PROM.
The display unit (DISPυ) is driven to display the displays shown in FIGS. 34(a) to 34(e).

Data other than the above is also sent to the display control circuit, but the display control circuit receives the battery installation signal and
It operates to display the displays shown in FIGS. 34(a) to 34(e). The microcomputer (μC) performs 2. at step (#205).
Wait 5 seconds and let this display continue for 2.5 seconds. and,
E2 Number of films stored in PROM Nl (MSb1
3~MSb18), film sensitivity Sv (MSb20~M
Read the contents of Sb25) and determine the number of films in RAM N.
l. Transfer to film sensitivity Sv (#207).

After that, card data exchange ■ is performed to check whether an IC card is installed and the type of IC card ($121)
0).

The subroutine of this card data communication I is shown in FIG. 5(a).
Shown below. In the same figure, first, a terminal (C8CD) is used to inform the IC card (CD) of communication with the IC card (CD).
) is set to "H" level, and the data output mode is set and data indicating data communication (see Table 6) is sent to the IC card by serial transfer (#300 and #305).

A microcomputer (μC) takes a certain amount of time to input this information on the IC card (CD) side, create the necessary data, and output it.
) waits (#310). And this time, data is sent from the IC card (CD), so it operates in input mode,
Perform serial transfer with IC card (CD) (#315)
When this is completed, the terminal (C8CD) is set to the "L" level (#320).

In this operation, the IC card (CD) side outputs 2 bytes of data, but this data is a byte signal indicating the presence/absence of the card, a byte signal indicating the type of card, and a 1 byte signal indicating the camera function. Address (20H, 21[
Entered in ().

Next, the type of IC card is determined in (#321), but in the case of a mode setting card, the data only indicates the type of IC card, and the second byte is all "0".
Therefore, it returns immediately, and on the other hand, in the case of a program card, the data includes not only the type of IC card but also the AF
Mode continuous/one shot (details will be explained later), AF zone spot/multi-point, metering zone spot/multi-point.

Since it contains function data indicating either continuous shooting or single shooting, or no specific setting (setting by the photographer), it is next determined whether the card function is selected ( #322). Card function is selected (CDF
When NF=1), the function data Fb2. Fb3゜F
b8. Rewrite the bit of Fb12 to set the data #323) and return. On the other hand, if the card function is not selected, the process returns without rewriting the data.

Returning to Figure 4, the microcomputer (μC) inputs the input data (
(See Table 7) to determine whether or not the IC card is installed, and if it is installed and not (bO = o in 208)
returns without displaying the type of IC card.

When an IC card is installed (bO of 20H = 1), the type of IC card is determined and the mode setting card (20H
If H bl = 1), create the display data for this IC card (08H bO = O) #230), and if the program card (20H bl = o), create the display data for the program (08H bo = 1) Create (#245)
.

In addition, the card function 0N (04H bO = 1), the control signal "0AH = O, O, 0, 1, O, 0, 0, O, (bo ~
b7), all display data is output to the display control circuit (DISPC).

The display control circuit (DISPC) inputs a signal indicating when the IC card is inserted and waits for a certain period of time (0.5 seconds).
, displays data according to the card type. Examples of this display are shown in FIGS. 35(a) and 35(b). FIG. 35(a) shows the state when the program card is installed, and FIG. 35(b) shows the state when the mode setting card is installed. At this time, the card function is forcibly turned on, so this data is also created and sent.

The microcontroller (μC) waits for this display time (0.5 seconds) in step (#270), sets a flag indicating that the card function is valid (#273), and enables all interrupts in the next step (#275). ), the process moves to step (#10) in FIG.

In Fig. 3, after completing the initial setting (#5), the exposure mode change switch (SEM) and the function change switch (
SFON), card function enable/disable switch (SCD)
It is determined in step (#10) whether either the card data setting switch (S CD5) or the photometry switch (So) is turned on based on the level of the terminal (IF5), and if any of the above switches is turned on. If not (IP5 = rHJ), battery installation flag (BAT
Determine whether or not F) is set in step (#15), and if it is set, proceed to step (#45) assuming that this step has been reached without doing anything after installing the battery.
The process jumps to step (#45) and controls to turn off the display and stop the IC card (CD) according to the flow from step (#45) onwards.

First, display data is 0AH=0.0.1. O,
Q, O, Q, O, and this data is sent to the display control circuit (
DISPC) (#45 to #60). Therefore,
The display will be completely off.

After sending the light-off data to the display control circuit (DISPC) as described above, the microcomputer (μC) sends a sleeve sign (command to stop the IC card) signal to the IC card (CD) (#65 to #75). This sleeve sign is constructed by bits C3bQ and C3b1 both becoming 1 as shown in Table 6.

After that, the transistor (Tri) is turned off by setting the terminal (PW) to "L", and the flag (AELF) indicating the AE lock and the flag (BAT) indicating when the battery is installed are turned off.
F), and all interrupts are enabled and stopped (#77 to #95). Note that this halt (HALT) also halts the oscillation of the built-in clock.

In the above step (#10), five switches (S
EM), (S FUN), (S CD), (S
If one of CD5) and (S o) is ON, proceed to step (#91), reset the flag (BATF) indicating when the battery is installed, and proceed to the next step (#91).
92) sets a flag (OPF) indicating that one of the above five switches has been operated, and the routine [SO
3) and return to step (#10). Routine [SO3 is a routine that performs photometry, AF, display, exposure control, etc., which will be described in detail later.

In step (#10), if none of the above five switches are turned on and the battery is not installed (
In BATF=O), it is determined whether a flag (OFF) that is set when passing through the -degree routine [SO3] is set (#15. #25). When this flag is set, the power hold timer (
TI) and reset the flag (OPF) (#30.#35). Here, the timer (T1
) to reset and start (#30), the routine (#93) has been passed through the -degree step (#10), (#91), (#92), and now all of the five switches are pressed. This is to extend the power retention for a certain period of time in consideration of the possibility that it may be turned on again, although the flag (OPF) is reset (#35
) is to indicate that step (#30) has been passed.

In step (#25), if the flag (OPF) is not set, step (#30) (#3
Skip step 5) and detect whether 10 seconds have passed for the reset-started timer described above #40), 10
If seconds have elapsed, proceed to steps after (#45) to turn off the display and stop the IC card (CD). 1
If 0 seconds have not elapsed, enter step (#93) and repeat the [SO3 routine].

Next, we will explain how to control the camera when an IC card (CD) is inserted.
A signal from rI, J level to r)(J level is input to NT), and the interrupt routine of (CDINTI) shown in Fig. 4 is executed.When this routine is entered, the microcomputer (μC) starts lens drive. Set the flag (OFF) to stop and maintain power (#290.11292
). Next, in order to give top priority to the display of the type of installed card, in step (#295) all other interruptions to this flow are prohibited, and the process proceeds to steps after step (#210). After displaying the type for a certain period of time as shown in Fig. 35 (a) or (b), a flag (CDFNF) is set to forcibly add the card function, and all interrupts are permitted, and the original flow [ Return to step (#10) in Figure 3. Switch (S EM), (S FtJN) with that interrupt enabled
), (S CD), (S CD5), (S o)
If any one of them is turned on, the interrupt terminal (IN
When a signal transitioning from the "H" level to the "L" level is input to the TI), the interrupt (INTI) operation shown in FIG. 3 is entered, and the flow from step (#91) onward is executed.

In addition, in the state of halt (HALT) t, any interrupt CINTI) [INT2) or [: CDIN
Even if the TI is turned on, the clock starts oscillating, and the clock (φ) is also sent to the IC card (CD).

Next, the above routine of [SO3] will be explained with reference to FIG.

First, [:INTl] interrupts for this flow are prohibited (#400). This is because if the interrupt [lNT1] in FIG. 3 occurs during the main control, the control operation will not proceed further. Next, (#405) microcontroller (μC
) terminal (pw) is set to "H" level, and the inverter (I
By applying a low level to the base of the PNP transistor (Tri) via the transistor (NI), the transistor (Tri) is activated.
Tri) supplies power to the ONL, photometric circuit (LM), AF circuit (AFct), etc. Next, the lens circuit (L
Enter information specific to the interchangeable lens from E) (#410)
. This is shown in FIG. 7 and explained. First, the terminal (C3L
E) is set to "H" level #600), and serial communication is performed to input information from the lens (#605). FIG. 36 shows the circuit inside the lens and will explain it. A decoder (2) counts the clock input from the camera and creates an address signal. At this time, when the predetermined address is reached, the lens data that changes depending on the zoom,
Or, because the lens data changes depending on the distance,
The encoders (3) and (4) detect the focal length and distance, and the address circuit (5) changes the address depending on the focal length or distance, and outputs predetermined data to the camera body. I'll do what I do. The switch (SQ) is a lens-side switch (see FIG. 37) provided on the lens (10), and since it is also necessary to change the data, the address is changed. The address thus set is output to the ROM. ROM (6) outputs data based on the designated address. This output is converted into a serial signal by a parallel-to-serial converter circuit (7) and is applied to the camera body.

Next, lens information will be explained. As shown in Table 12, the lens information sent to the camera body includes the lens attachment signal, lens open aperture (Avo), lens maximum aperture (AVMAX), distance information, focal length information, (lens drive (amount/defocus amount) conversion coefficient, ON/OFF of the above-mentioned lens side switch (SQ), information indicating whether or not to drive the lens (LOK), etc., and is stored in the RAM at the address in the body shown in the table. is input.

The signal (L OK) is not particularly relevant on the camera body side in this embodiment, but it changes the address from "1" to "0" when the state becomes such that AF cannot be performed, and the address changes accordingly. be. "1" if AF is always possible
, and does not require 2 bytes. The camera body receives this signal and stops the motor.

On the other hand, on the lens (10) side, the RO as shown in Table 10
M and address configuration. In (A) and CB), two similar pieces of data that differ only in SQ quantity relationship and LOK relationship are stored in the same ROM width. Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data that indicates whether the switch is ON or OFF means that the switch is ON in the ROM.

The data will be changed by changing the address depending on the OFF status, which means that an additional 2 bytes (ON, 0FF) are required. If there is enough ROM for each type, add 2 bytes 06H and 08H as shown in Table 11 and change the address according to OFF or ON of the lens side switch (SQ) to 061 (, 081). However, if there is no such margin, as shown in Table 10, the ROM provided for multiple types [(B) in this embodiment] can be switched ON and OFF.
This can be done by keeping the data the same except for the data changed by F, and selecting (A) or (B) depending on whether the switch is OFF or ON. However, in this case, this ROM
However, there are fewer types of lenses that can be used. Now, if the lens side switch (SQ) is OFF, 06H and 07
Conversely, if H1 is ON, 16B and 178 (bo= O, A
F motor stop) is now sent. Note that (XXX) in the address indicates address data that changes depending on zoom or distance, and encoder (3) (4
) is input.

The signal (L OK) in the lens indicates that the lens is not for AF use. Upon receiving this signal, the camera body side prohibits AF operation (lens drive) and performs only focus detection operation. Table 10 shows lenses that can always perform AF operation. For example, some zoom lenses with macros cannot perform AF operation when in macro mode, and LOK is set to prohibit AF operation for such lenses.

= 0 (this can be done by changing the address or switching the ROM), and when not in macro mode, the LOK bo = 1 to permit AF operation.

Now, even when a lens that has the function of the above switch (SQ) is attached to an old camera that does not read this bit (because it is new data), it will also have the function of this lens side switch (SQ). (However, when the function changes due to the IC card - focus lock.

Continuous and Spot AF selection - the latter two cannot be done because the IC card is not an old camera, so only focus lock is possible), the above switch (SQ
) is turned on and the LOK signal is set to prohibit AF, the old camera is considered to be a lens that cannot perform AF, and AF operation is prohibited and only focus detection is performed. In order to do this, when the switch (SQ) is turned on, A in Table 10, 08H109H1 in Table 11, and when the switch (SQ) is OFF, B in Table 10, 1
In Table 1, the values may be changed to 06H and 07H, respectively.

Regarding the control on the old camera side, it is only necessary to determine whether or not to inhibit AF when reading the lens data, and to control whether or not to inhibit AF, so a description with reference to the drawings will be omitted.

After entering the lens information described above, the terminal (C3
LE) is set to "L" level and returns (#610).

Returning to FIG. 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST) (11
415). The information includes three types of information: a guide number (GN) indicating the amount of light emitted, and whether the battery is fully charged or not, forced light emission, or automatic light emission (this will be described later). Here, the operation of the information communication method will be explained. In addition, FIG. 9(a) shows the electronic flash device (ST), and FIG. 9(b) shows the interface (IF).
) are shown in their respective circuit diagrams.

First, the microcomputer (μC) connects the terminal (C8S) shown in Figure 1.
T) is set to the "H" level for a certain period of time (tl), and this signal is output to the electronic flash device (ST). Electronic flash device (
ST) detects the time (tl) of this signal, recognizes the data output mode, and outputs data in accordance with the clock from the microcomputer (μC).

In the interface circuit (IF) shown in Figure 9(b), the signal from the terminal (C3ST) of the microcomputer (μC) is sent to the terminal (STI) of the electronic flash device via the OR circuit (OR21).
Output to. At this time, both signals input to the OR circuit (OR21) are at the "L" level. In the electronic flash device (ST), the signal from the terminal (STI) is input to the AND circuit (ANDll), so the AND circuit (A
NDII) becomes active and outputs the signal from the oscillation circuit (O8C) to the counter (CNT12). The counter counts this and measures the time (tl). When the time (tl) is counted, the terminal (T1) is set to "H" level and the Rs flip-flop (SRII) is set. At this time, the RS flip-flop (SR12) remains reset, and its output port is at the "H" level. Therefore, the AND circuit (AND12) becomes active.

Next, the microcontroller (μC) uses a serial communication clock (
SCK). This clock (SCK) is output to the terminal (STI) of the electronic flash device (ST) via the OR circuit (OR21) of the interface circuit (IF). In an electronic flash device (ST), the input clog (
SCK) is connected in parallel/through an AND circuit (AND12).
It is input to the clock terminal of the serial conversion circuit (P/S). This parallel/serial conversion circuit (P/S) outputs a guide number (GN), a signal 9 indicating a charging completion state, and a signal indicating forced light emission or automatic light emission in synchronization with the clock.

The counter (CNTII) of the electronic flash device (ST) counts the input clock (SCK), and when a predetermined required number is counted, the "rH" level is output to the OR circuit (ORI).
I). This signal is an OR circuit (ORII),
The counter (C
It is input to the reset terminal of NT12), and the counter is reset.

The counter (CNTII) is a counter that is reset after counting a predetermined number of clocks.

In addition to the above-mentioned circuit elements, the electronic flash device includes a battery (EST) as a power source, a voltage booster circuit (UV) for boosting the voltage of the battery to the voltage required for flashlight emission, and a voltage from the voltage booster circuit (UV). A rectifier diode (
Dll), main capacitor (MC) that stores the energy necessary for flash light emission, main capacitor (MC)
A charging voltage detection circuit (CVD) that detects the charging voltage of
Light emission control circuit (FCC) that controls the start and stop of light emission
)have.

Returning to FIG. 6, the AF mode is determined in step (#417). This subroutine for determining the AF mode is shown in FIG. 6(a). First, it is determined from the lens information whether the above-mentioned lens side switch (SQ) is turned on (
#4000), if this switch is ON, reset/start the power hold time (starts from 10 seconds), set the flag (opF) in step (#4005)
Next, read the information from the E2E'ROM and check whether the AF mode set by the IC card is the focus lock mode (#4010).
Judge by. Here, if it is focus lock mode (MSb26.27=1.1), the bit indicating this (
Fb14) and reset the bit (Fb13) indicating the auxiliary light mode, and if the tracking mode is displayed, turn it off (#4020 to #4020).
4030).

This is because in the focus lock mode, since AF operation is prohibited, subsequent AF operation is not required, and the emission of the auxiliary light required for this is prohibited, thereby saving power.

The tracking display is also wasteful since the lens is not driven and the tracking operation cannot be performed after the focus is locked, so the tracking flag is reset and turned off.

Next, determine whether the AF mode set by the IC card (CD) is spot AF (#4035)
. This step (#4035) requires the above step (#4035).
4010), it also occurs when the focus lock mode is not in effect. Here, if spot AF is used (MSb2
6, 27=0.1), the switch (SQ) is turned on,
A flag indicating that this flow has passed for the first time (SQON
Step (#4036) determines whether or not F) is set.
), and if it is not set, step (#4
Step 037), in order to memorize the multi-point/spot mode before the switch (SQ) is turned on, move the contents of bit (Fb2) to bit (Fb15), and proceed to step (#404).
Proceed to 0). If the flag (SQONF) is set, step (#4037) is skipped and the process proceeds to step (#4040). Step (#4040)
Now, in order to set the bit (1?b2) indicating spot AF and display this mode, regardless of the IC card selection, set the multi-point/spot display flag in step (#4042) and proceed to step ( Proceed to #4045).

If spot AF is not selected in step (#4035), steps (#4036 to #4042) are skipped and the process proceeds to step (#4045). Step (#40
45) determines whether it is continuous AF or not.
In the case of continuous AF (MSb26.27=
1.0), set the bit indicating this (Fb8 = 1) #4050), reset the bit indicating the auxiliary light (Fb13) in step (#4055), and set the flag (SQONF) indicating that this flow has passed. ) step ($40
57) and return. It is now assumed that the auxiliary light mode for continuous AF is prohibited in consideration of power saving. With continuous AF, where focus detection never ends, if the auxiliary light is emitted every time focus detection (integration) is performed, the battery, which is the power source, will wear out quickly and the number of films that can be shot will decrease. It is. If it is not continuous AF in step (#4045), proceed to step (#4057) and flag (SQ
ONF) and return. In addition, the switch (S
In the flow when Q) is on, with the IC card, focus lock, spot AF1, continuous A
Since only one of F is set, for example, if the focus is locked in step (#4010), step (#4035) and (#4045) are set.
), the answer is No in both cases.

In step (#4000) above, switch on the lens side (S)
Q) is OFF, the process advances to step (#4060).

In this step (#4060), the bit (Fb14) indicating the focus lock function is reset.

Next, in step (#4061), it is determined whether there is also a setting for spot AF/multi-point AF using an IC card (CD), and if there is no setting, multi-point/multi-point AF is set to erase the multi-point/spot display.
The spot display flag is reset (#4062). Then, it is determined in step (#4063) whether the switch (SQ) has changed from ON to OFF, and if it has turned OFF (SQONF=1), the multi-point/spot before the switch (SQ) was turned ON is determined. Step (
#4064) changes the contents of bit (Fb15) to bit (Fb15).
Move to b2). If the switch (SQ) has not changed from ON to OFF (SQONF=0), the switch (SQ)
Assuming that this flow is passed while Q) is OFF, step (#4064) is skipped. In either case, the process proceeds to step (#4080).

In the above step (#4061), if it is determined that the setting is set, step (#4065
) to set the multi-point/spot display flag.

Next, in step (#4067), it is determined whether it is spot AF or not, and if it is spot AF, a bit indicating this (
Fb2) in step (#4070), and if it is not an AF spot, reset this bit (Fb2) in step (#4075) (that is, set it to multi-point AF),
Each proceeds to step (#4080). Step (#
4080), it is determined whether there is either one-shot AF/continuous AF setting, and if there is no setting, proceed to step (#4090), set Fb8=O (one-shot AF), and proceed to step (#4097). move on. If there is a setting, one-shot AF in step (#4085)
If it is one-shot AF, reset the bit (Fb8) to indicate this in step (#4090), otherwise, in step (#4095)
The bit is set (ie, as continuous AF), the flag (SQONF) is reset in the next step (#4097), and the process returns.

Returning to FIG. 6, after the microcomputer (μC) determines the AF mode described above, it performs card data communication with the IC card (CD) in order to determine the type of the industrial C card (CD).
#420). This card data communication I has already been explained with reference to FIG. 5, so the explanation will be omitted here. After the card data communication, a flag (S
(ETF) is set or not (#425), and if it is not set, press the AF start switch (
SL) is turned on or not based on the level of the terminal (IP6) (#427). The above switch (Sl
) is turned on (IP6 “L” level), AF
control (#429). On the other hand, when the flag (SETF) indicating the data setting mode is set or when the switch (sl) is 0FF (IP6 = "H" level), the AF drive is disabled to prohibit AF operation. A signal to stop the lens motor should be output to the lens control circuit (LECN) to stop lens drive #431), and a flag (AFNF) indicating that AF is not being performed should be set #4
35), and further resets the flag (SIONF) indicating ON of the switch (31) (#437). When the data setting mode is set in this way, AF control is prohibited and data setting is prioritized, so even if the AF start switch (Sl) is pressed by mistake during data setting, AF operation will not be performed. That's what I do.

Here, regarding the above-mentioned AF control, FIGS. 10(a) to 1
The flowchart shown in FIG. 0(f) will be explained with reference to FIG. 11 showing the focus detection range in the photographic screen. At that time, the photometry range will also be explained.

First, in FIG. 11, the outer rectangle (12) indicates the photographing screen. Among them, (LMI) to (LM4) indicate the photometry range, and (AFL) to (AF3) indicate the focus detection range. Regarding the focus detection range, the camera can switch between spot/multi-point AF, and spot AF
When you select , AF is performed based on the subject information in the focus detection range (AF2), and when multi-point AF is selected, the subject closest to the camera is selected from the above three ranges (AFL) to (AF3). AF is performed to bring the subject into focus. Hereinafter, (API) is the first island, (A
F2) will be called the second island, and (AF3) will be called the third island.

To explain the AF control shown in the flowchart of Fig. 10(a), first, in order to detect whether the AF start switch (sl) is pressed for the first time, a flag (SIONF) is determined and whether it is set or not is determined. If not, it is assumed that it is pressed for the first time, and the flag (A
FEF) and proceeds to step (71705).

If it is set, proceed directly to step (#705) without passing through step (#702). Then, it is determined whether the lens is attached or not based on the input signal from the lens (#705). And step (#
If the lens is not attached at step 705), a flag (AFNF) indicating that AF is not being performed is set and the process returns (#800).

If a lens is attached, focus adjustment mode is A.
Use the terminal (IPlo) to indicate whether it is F mode or M mode.
If the AF mode is determined (#710), it is determined in step (#711) whether the focus lock mode is selected using the bit (Fb14). When in M mode, step (#798
) to disable the auxiliary light mode (Fb13.0), execute the manual focus routine (MFOCUS) in the next step (#799), and then set the flag (AFNF) indicating that AF is not being performed. (#80
0), the process proceeds to step (#780) and determines whether or not focus is achieved. If the image is in focus, a flag (AFEF) is set; if the image is not in focus, the flag (AFEF) is reset and the process returns.

This manual focus subroutine is shown in Figure 10 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump. In manual focus, a flag (AF2F) indicating the second island among the three islands in the AF area is set, the day focus amount (DF2) of this island is calculated, and this is set as the day focus amount and returned ( #
4100~#4110).

The integral control subroutine in the above step ($14101) is shown in FIG. 10(b) and will be explained first.
When the focus cannot be detected (LCONF=1) or when it is not in the auxiliary light mode (Fb13=0), the auxiliary light is not emitted, the integration is performed, the data is dumped after the integration is completed, and the process returns (#4150). . #4155. #4
165. #4170). When the focus is not undetectable,
In addition, when in the auxiliary light mode, the light is emitted before the start of integration, and in order to emit light for a certain period of time, the terminal (OLD) is set to the "H" level for a certain period of time, and integration is performed (#4150 to #4150).
4170).

Returning to FIG. 10(a), step (#710) and (
As a result of the judgment in #711), if focus lock is selected in the AF mode, the lens drive is stopped in step (#712), and a flag (AFE
It is determined whether F) is set #713), and if it is set, proceed to step (#714),
The M focus is controlled and the process proceeds to step (#780).

If it is not set, step (#799)
move on. The reason for determining focus here is that if the focus is locked after focusing, you want to use the distance data of the subject at the time of focus (used for image magnification) to determine the photometric value. It is.

AF is determined in step (#710) of FIG. 10(a), focus is locked in the next step (#711), and then a flag (AFNF) indicating that AF is not performed is set in step (#715). ), and
In step (#717), a flag (MFF) indicating manual focus is reset. The microcomputer (μC) controls the accumulation (integration) of charges generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, the integrated value is converted into digital data and the obtained data is input (#720 ).

Then, in step ($1730), it is detected whether or not the spot AF is enabled (detected by Fb2 of the function data), and the spot AF is
If (Fb2=1), the process proceeds to step (#735) and executes the spot AF subroutine shown in FIG. 10(d). In this subroutine, a flag indicating that AF is being performed (AF
2F), calculate the day focus amount (DF2) of the second island from the input data, and use this as the day focus amount for lens driving (#4102 to #411
0).

On the other hand, in step (#730) of FIG. 10(a), multiple points A
When F mode is selected, step (#74
0) and executes the normal AF control subroutine shown in FIG. 10(C). At that time, 1. Second. The day focus amount (DF) of the third island is calculated, and among the above, the day focus amount for the subject closest to the camera is calculated (#4200 to #4215).

The subroutine for determining the day focus amount is shown in FIG. If the subject is closer to the camera than the focus position of the lens, the amount of day focus is positive, and its absolute value indicates the size of the day focus.To detect the subject closest to the camera, it takes 3 It is sufficient to detect the maximum (including positive and negative) day focus amount among the day focus amounts of the two islands, and it is assumed that the main subject exists in the focus detection area.

In FIG. 10(f), the microcomputer (μC) first resets the flag indicating the island (AFIF-AP3F), detects the largest day focus island, and converts the detected island day focus amount into the lens driving day focus amount. , set the above flag (AFIF-AP3F) according to the island and return (#
810~#865).

After calculating the day focus amount, in step (#745) of FIG. 10(a), it is checked whether the focus cannot be detected (the data is unreliable) (for example, it is determined whether the contrast is low, If it is low, focus detection is disabled) If focus detection is not possible, proceed to step (#747) to determine whether or not it was in the auxiliary light mode, and if it was in the auxiliary light mode, further focus detection is performed. It is useless to do this, so please set a flag (LCONF) to indicate this.
1752), resets a flag indicating that it is the follow mode (described later) (#755), and returns. In step (#747), if it is not the auxiliary light mode, proceed to step (#757) to detect whether the brightness is low,
When the brightness is not low, it is useless to emit the auxiliary light, so the process proceeds to step (#752) and the same process as described above is performed.

On the other hand, when the brightness is low, step (11760) sets the auxiliary light mode (Fb13=1), and step (#7
Proceed to step 55).

Next, if the microcomputer (μC) is not unable to detect the focus,
Reset the flag (LCONF) (#762), and check whether or not the focus is achieved from the day focus amount for lens drive (#762).
$765), and if it is in focus, set a flag (AFEF) indicating the focused state (11767) and set the flag (AFEIF) and step (#755)
Proceed to.

If the focus is not in step (#765), step (#765)
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown and explained in Fig. 10(e). One-shot AF (once the lens is in focus, subsequent lens driving is stopped, and focus detection may also be stopped at this time) is different from continuous AF ( It is determined based on data (Fb8) whether the lens is to follow the subject even after focusing and drive the lens according to the determined day focus amount (#4250).

In the case of one-shot AF (Fb8=O), check whether the flag (AFEF) indicating focus is set (#425).
5), and if it is not set or continuous AF (Fb8 = 1), step (
#4327), (#4330) and step (#4
The process proceeds to step 340), where the lens drive is controlled. Step (
In step (#4327), the flag (AFEF) indicating focus is reset, and in step (#4330), the lens driving amount (LN) is calculated by multiplying the day focus amount (DF) by the value. #4340) to drive the lens and return. Note that this step (#43
The lens drive in 40) is performed by the lens drive circuit (LECN).
is performed by driving the lens by a value corresponding to the driving amount (LN).

In step (#4255), when the flag (AFEF) indicating that the focus is set is set, the process proceeds to step (#4260), and the flag (AFEIF) indicating that the focus is achieved from the out-of-focus state is set. Determine whether the When set, preparation processing for tracking determination (determining whether the subject is moving), which will be described later, is performed. First, in step (#4265), a register (DF2) for storing the day focus amount, (D
F3) and store the obtained day focus amount (DF) in the same register (DPI) (#427
0), set the variable (N) to O (#4275), reset the above (AFEIF) (#4280), and return. In step (#4260), after focusing (A
FEF=1), when performing focus detection from the second time onwards (AF
EIF=O), proceed to step (#4285), and sequentially memorize the day focus amount in the register that stores the day focus amount [the contents of the register (DF2) are stored in the register (DF3), the contents of the register (DPI) is stored in the register (DF2), and the obtained day focus amount (DF) is stored in the register (DPI)] Add 1 to the variable (N), and if this (N) is 2 or more, that is, after focusing, focus is detected 3 times. If the number of times has been exceeded twice, the process returns without driving the lens (#4285 to #4305).

In step (#4305), if it has been performed three or more times (N22), proceed to step (#4310),
The day focus amount is calculated from the average of the past three day focus amounts (the average of the contents stored in the register), and in the next step (#4315) it is determined whether this value is greater than or equal to a predetermined value KDF. This means that it has been determined in the past three focus detections whether the subject is moving at a predetermined speed (on the image plane). When the value is less than the predetermined value, it is assumed that the subject is not moving, and the tracking flag is reset (#4).
320), return.

This flag is used for display (infinder). On the other hand, when the day focus amount is more than a predetermined value,
When the subject is moving, the flag (
Follow F) should be set #4325) and step (#
4327) to reset the focus display flag (focus F) (this is done because the subject is already moving) and set the lens drive amount to the day focus amount (lens Multiply the driving amount/day focus), drive the lens, and return (#4330. #43
40).

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When set based on F), the green LED lights up, and otherwise (focus F=0) turns off. Further, when the focus cannot be detected (LCONF=1), the red LED is blinked, and when it is not (LCONF=O), it is turned off. (102) indicates a focus detection area, and when the inner area (102a) is displayed, it indicates spot AF, and when only the outer area (102b) is displayed, it indicates multi-point distance measurement. (103) is displayed when the mode for continuous AF or tracking mode is indicated (following F=1), and is turned off when the mode is not continuous AF or tracking mode. (104) “AF/MJ is A P-1=
-t (7) To! (AFNF=O) AF display; otherwise (AFNF=1), M display is performed. In addition, AF
When the switch (Sl) is OFF (81OFF=O),
The display in the viewfinder is turned off.

Returning to FIG. 6 again, the microcomputer (μC) controls changes to various data by operating various key switches (#440).

To explain this as shown in FIG. 12, first, the status of each key switch is checked and this is stored in memory (#900).

Next, set the flag (SET) indicating that the card is in card setting mode.
It is determined in (#905) whether or not F) is set, and if the flag (SETF) is set, the process advances to step (#945). If the flag (SETF) is not set, the process advances to step (#910) and it is determined whether the exposure mode change switch (SEM) is turned on or not. Here, the switch (SEM) is O
When N is selected, this change subroutine (#9
Proceed to step 15) and return (details will be described later). If the above switch (SIICM) is not turned on, proceed to step (#920) and turn on the function change switch (S FUN).
) is turned on. Then, when this switch (S FUN) is turned on, the process proceeds to the subroutine for that change (#925) and returns.

Here, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Each time the up switch (Sup) is turned on, the process progresses cyclically from P to A to S to M, and then returns to P, and each time the down switch (S dn) is turned on, the process progresses sequentially from P to A to S to M and then back to P. It progresses like P4-A4-8+M, and after P it advances cyclically in the opposite direction to the above-mentioned up direction, but it depends on the exposure mode set by the IC card (CD). The mode will be changed accordingly, and unselected modes will be skipped.

To explain this with reference to FIG.
) is the up switch (
It is determined whether Sup) is turned on, and if it is not turned on, the process proceeds to step (#1055). If it is ON, proceed to step (#1005) and set the RA
Check (FbO) (Fbl) of the function data (Fbn) of M, determine whether P mode is currently selected as the control exposure mode, and if it is selected, step (#1
010) and check whether the A mode is selected by the IC card by checking (MSb6) to (MSB6) of the internal E2FROM.
b8) (see Table 4) and if selected, change the exposure mode to P, l! l”) A Change the functional data (FbO, Fbl) from (0,0) to (0,1)
and return (#1015). The above steps (
#1010), when it is determined that A mode is not selected by the IC card, step (#1
025), determine whether S mode is selected,
If the S mode is not selected, the process further advances to step (#1040) to check whether the M mode is selected and sequentially search for modes selected by cards.

Then, if there is a selected mode, it is set.

When the A, S, and M modes are not selected, that is, when only the P mode is selected, the P mode is selected (111050).

Similarly, when A mode is currently selected as the control exposure mode (FbO, Fbl = 0.1), the IC
Determine whether S mode is selected by the card, or if not, whether M mode is selected,
Change the exposure mode to the selected mode and press Bit (F
bO), (Fbl) and return (#10
20-1030).

Now, when S mode is selected as the control exposure mode (FbO, Fbl = 1.1), M mode is IC
Determine whether it is selected by the card, if selected, set to M mode, if not selected, P
mode and return (#1035 to #1045)
. When the control exposure mode is not the S mode, that is, when it is the M mode, the mode then becomes the P mode. This is because the P mode is always selected in this embodiment.

In step (#1055), the down switch (Sd
When n) is turned on, the same control as the up switch (Sup) described above is performed except that the direction in which the exposure mode is changed is different, so a description thereof will be omitted.

In addition, both switches (S up) (S dn) are set to O.
If it is FF, do nothing and return.

Next, the function change switch (SFUN) shown in Fig. 14(a)
) is turned ON. Microcomputer (μC
) has the four functions mentioned above, namely, highlight/shadow ([(/S), exposure compensation (+/-), single shooting/continuous shooting (S/
C), spot AF/multi-point A, F (S/A) is selected by checking the E2FROM bit (M
SbO to Msb3), and if none of these bits are set, return as there is no mode selection (#1200). If at least one is set, at least one mode is selected. Step (#12) where data should be changed
05) Execute the following flow. The microcomputer (μC) is
Determine whether or not the switch (S SE) indicating the function to be changed is turned on, and if it is turned on, the function to be changed is H/S→+/−→S/C-+S/A. Go on,
After S/A, the flow returns to H/S and so on, cyclically in advance A-1, but if no function is selected by the IC card, it is skipped over. In step (#1210), the function to be changed now is H/
When S mode is indicated (CDbO, CDbl, CDb2 of RAM data shown in Table 5 = 0.0°0), +/
- Check whether the mode is selected by the IC card in step (#12L5).
l), and if +/- mode is selected, the data change mode is set to +/- mode, and the data CD
Return as bO~CDb2=O, 0, 1 (#
1220), when the +/- mode is not selected, proceed to step (#1227) and determine whether the S/C mode is selected by (MSb2), and when this is also not selected (MSb2= 0) has step (4
11240) and determines whether the A/S mode is selected by (MSb3). If this is not selected (MSb3=0), proceed to step (#1250).
Proceed to and determine whether H/S mode is selected (
MSbO). Now at least! (/S mode is selected, so if you want to change the functions of [(/S mode), click
Let bO~CDb2=0.0.0. S/C mode,
When the A/S mode is selected, CDbO to CDb2 are set to change this mode. Similarly, the mode next to the mode of the function to be changed now (+/- mode for H/S mode, S/C mode for +/- mode, S/A mode for S/C mode, S/A mode for S/C mode,
If mode, H/S mode) is selected by the card, and if it is selected, the change mode is set to the next mode, and if it is not selected, H/S→→/−→
The function selected by the IC card is searched in order of S/C-+S/A-48/S-1, data CDbO to CDb2 are set as the function to be changed from the selected function, and the process returns.

As can be seen, modes not previously selected by the card will be skipped with respect to the change mode. For example, if the selected changeable mode is +/- and S/C
If the function change switch (S FUN) is pressed, the flow goes to step (#1225),
At this point, the process advances to step (#1227) and the S/C mode becomes the mode to be changed. On the display, this means that the cursor moves from +/- to S/C. Next, when the function change switch (S FtlN) is pressed again, the flow goes to step (#1235), and from here steps (#1240) → (#1250) → (#121
5), 10/- becomes the mode to be changed, and the cursor on the display moves to +/-. In these cases, H/S
Since the mode and A/S mode are not selected, they are effectively skipped over in terms of setting the change mode.

In step (#1205), the switch (SSE)
If not turned on, the process advances to step (#1285).

In step (#1265), up switch (Sup)
Determines whether the function is turned on, and if it is turned on, the data (CDbO-
CDb2), and if it is H/S mode, the currently set mode is determined by data (FbO) (Fb7), and the mode cyclically advances to the next mode (→H-+S→No H/S). ), data (FbO)
, (Fb7) should be set #1270. #1275)
, return.

If the function is in the ÷/- mode (11285), 0.5 is added to the exposure correction amount (ΔEv), and the process proceeds to a subroutine ($1287) for determining the magnitude. This subroutine is shown in FIG. 14(b), and if the correction amount (ΔEv) is positive, data Fb4. Fb5=0.
1, and if it is negative side correction, data Fb4. Fb5=
1. O, and if the correction is zero, no correction is assumed and data Fb4. Return with Fb5=0.0 ($11350~#1370).

Returning to Figure 14 (a), if it is S/C mode, it is determined whether the current mode is single shooting (S) or continuous shooting based on the data (Fb3), and the current mode is set to be the opposite of the current mode. Change the data to #1295) and return. The above three modes (H/S mode, +/- mode, S/C mode)
If neither of these is selected, that is, the 8/A mode, the current mode is spot A F (S) or multi-point A F (A).
Determine whether it is by the data (Fb2) and change the data (Fb2) so that it is opposite to the current mode.
300), return.

In step (#1265), the up switch (Su
p) is not turned on, the process advances to step (#1305), where it is determined whether the down switch (S dn) is turned on, and if it is not turned on, the process returns. ON
If the mode in H/S mode is changed, the order of change is reversed (←H-34-No H/S←
), and if in ÷/- mode, the exposure compensation amount (
Except for subtracting Q and 5Ev from ΔEv), the flow is the same as the flow when the up switch (Sup) is ON, so the explanation will be omitted (#1310 to #134).

Returning to Figure 12, the exposure mode change switch (SEM),
If both function change switches (8FtlN) are OFF, the up switch (S up) and down switch (
Sdn), aperture value (Av), shutter speed (Tv
) The process advances to step (#927) showing a subroutine for changing.

This subroutine is shown in FIGS. 21(a) and 21(b), and will be explained first.
Step (#1800)
), and if it is not turned on, step (#18
Proceeding to Q5), it is determined whether the down switch (Sdn) is turned on, and if it is not turned on, the process returns. When the up switch (Sup) is turned on,
Proceeding from step (#1800) to step (#1810), it is determined whether or not the M mode is set. If it is in M mode (FbO, Fbl = 1. O), proceed to step (#1811) and check whether it is in M1 mode (shutter speed can be changed only by operating the up and down switches) or not in E2FROM. Determine based on the bit (MSb28), and if it is M1 mode (MSb28=O), the aperture change switch (SAv) is activated in the next step (#1821).
Determine whether or not is turned on, and if it is turned on (
IP13= r LJ ) Step (
#1830), if it is not turned on (IP13=
rHj ), step (#
1823). First, I will explain how to change the shutter speed.This speed change is in 172Ev steps, or IEv
The E2 PROM bit (MSb29)
), and if it is 1/2Ev setting mode (MSb29=1), step (#1850)
The process moves to step (81855), adds 0.5 to the current shutter speed (Tv), and moves to step (81855). - On the other hand, when performing in lEv increments (MSb29=O), in step (#1824) it is determined whether the current shutter speed is Ev/2 or not, and the set value of Ev/2 [for example, Tv=6
．． 5 (SS 1/90)], in step (#1825) add 0.5Ev to this (TV=6
．． 54TV=7(SS 1/90-438 1/12
0)), IEv unit, and add a further step to this value (
#1826) Add IEv and step (#1855)
Proceed to. In step (#1855), it is determined whether or not the set shutter speed exceeds the maximum speed (TVIIIIX), and only if it exceeds, it is limited to the maximum speed (#1860), and the process returns. If it does not exceed
Skip step (#1860) and return.

In step (#1821), the aperture change switch (
When the aperture value (SAv) is ON, it is assumed that the aperture value change mode is set, and the aperture value (Av
) to determine whether this exceeds the maximum controllable aperture value (Avs. 8) (#18
35). If it exceeds, set the maximum aperture value (Avmax) as the aperture value (Av) #1840), if it does not exceed it, do nothing and step (#1845)
It is determined whether the mode is P mode or not. If the mode is P mode, the process proceeds to step (#1879) of the flowchart of FIG. 21(b). Returns if not in P mode. In step (#1811), if the mode is not M1 (MSb28=1), step (#1822
), it is determined whether the aperture change switch (S Av) is turned on or not. If it is turned on, the shutter speed is changed and the process goes to step (#1823). If it is not turned on, the aperture is changed. Proceed to step (#1830).

If it is not M mode in step (#1810), it is determined whether it is in P mode or A mode in steps (#1815) and (#1820), and P mode, A
Either mode (FbO, Fbl = 0. O
or 0, 1), proceed to step (#1830),
Performs up control of the aperture value (Av), neither
That is, when in S mode (FbO, Fbl = 1.1)
Proceeds to step (#1823) and shutter speed (Tv
).

Step (#, 1805') down switch (Sd
n) is ON, the process proceeds to step (#1865) in FIG. 21(b), and it is determined whether or not the mode is M mode. If the mode is M mode (FbO, Fbl=1.0)
, proceeds to step (#1876), determines whether or not it is in M1 mode, and when it is in M1 mode (MSb28=O
), determine whether the aperture change switch (SAv) is ON (#1877); if it is ON, proceed to step (#1885) to change the aperture; if not, proceed to step (#1885) to change the shutter speed. 1879)
Proceed to. In step (#1879), it is determined whether or not the setting mode is in 1/2Ev increments, and if it is in 1/2Ev increments (MSb29=1), step (#1905
), subtract 0.5Ev from the set shutter speed, and this is the camera's minimum shutter speed (Tv-+n).
It is determined whether the shutter speed is slower than that (#1907), and if it is slower, the shutter speed is limited to the lowest shutter speed (#1908); otherwise, the process returns without doing anything. If it is in 1Ev increments (MSb29 = 0), determine whether the current setting value is in 1/2Ev units, and if it is in 1/2Ev units, 0
．． Add 5Ev, subtract 1 OEv from the added value, and return (#1880 to #1882). Step (
11880), if the unit is not 1/2Ev, step (#1882) calculates 1. Subtract OEv and proceed to step (#1907). Step (#1
877) when the aperture change mode is determined (SAvO
N), in step (#1885), the aperture value (Av) is decreased by 0.5Ev, and then in step (#18
90), it is determined whether the value is smaller than the open aperture value (Av.), and if it is, the aperture value is changed to the open aperture value (Av.
, ) (#1895).

Next, step to determine whether it is in P mode (#1900)
Judge by. In step (#1890), if the aperture value (Av) is not smaller than the open aperture value (Av, ), step (#1895) is skipped and step (#1900) is entered. If the determination in this step (#1900) is that the mode is P, the process proceeds to the above-described control flow for increasing the aperture value (#1823 to #1860) in FIG. 21(a), and if it is not the P mode, the process returns.

In step (#1876), if it is not the M1 mode (MSb28=1), the process proceeds to step (#1878), where it is determined whether or not the aperture change switch (SAv) is turned on, and if it is turned on, the shutter Proceed to step (#1879) to change the speed, and if it is not ON, proceed to step (#18) to change the aperture.
Proceed to step 85).

In step (#1865), if the mode is not M mode, step (#1870) and (1875) sequentially determine whether the mode is P mode or A mode. 1885) onwards, proceed to the flow for controlling the aperture value reduction, and if not, proceed to step (91879) assuming that the S mode is in effect.
) and control the shutter speed down.

Returning to FIG. 12, steps (
After passing through step #927), the process proceeds to step (#930). In this step (#930), a normally open switch (S, C) is used to enable or disable the functions set by the card.
It is determined whether or not D) is turned on, and if it is turned on, the process advances to step (#935), a subroutine for the card function enable/disable switch 0N (SCDON).

This is shown in FIG. 15 and will be explained. First, step (#1
400), it is determined based on the data (CkbO) whether or not the C card (CD) is loaded in the camera, and the IC
If no card is loaded (CkbO=O), return immediately. When the mode setting card is loaded, the card function enable/disable switch (SCD) is operated and the flag (CD) indicating that this flow has been passed once is set.
Determine whether F) is set (#1405
). If it is set, it is assumed that the valid/invalid switching has already been completed during the operation and the process returns. If it is not set, proceed to the next step (#141
0), sets this flag (CDF), and then in step (#1415), determines the flag (CDFNF) indicating whether the card function is valid/invalid, and if it is not set, sets it to activate the card function. Effective #1
420), if it is set, it is set to invalidate the card function (#1425), and the process returns.

The flow when the card function enable/disable switch (SCD) is ON in the determination at step (#930) in FIG. 12 was explained above in accordance with FIG. 15. When the enable/disable switch (SCD) is OFF, step (#940
).

The flow of this step (#940) will be explained with reference to FIG. 16. First, in step (#1450) it is determined whether or not an IC card is installed. = o) returns, IC
When the card is loaded (bo=1 in 20H), the process advances to step (#1455) and a flag (CDF) is set indicating that the flow after step (#1405) in Figure 15 described above has been passed once. If it is determined whether or not the flag (CI)F) is set, in the next step (#1460) it is reset and the process returns to confirm that the flag (CDF) is not set. If so, return as is.

Returning to Figure 12, the microcomputer (μC) then steps (#
945) to change the mode using an IC card or set or reset the data setting mode.
CDS) is determined to be ON or 0FII, and if it is ON or OFF, the process returns through steps (#955) and (#950) related to the control of the respective subroutines. This will be illustrated and explained in FIGS. 17 and 18.

First, Figure 17 shows the subroutine when the switch (S CD5) is turned on, and the microcomputer (μC)
In step (#1500), it is determined whether the mode setting card is installed, and if the card is not installed (b2-0 of 20H), the process immediately returns.

If the mode setting card is installed (b2 of 20H)
=1), check whether the flag (CDSF) indicating that this flow has been passed once is set. #151
0), if it is not set, please set this #1
515), if set, step (#15
15) and return.

Next, the OF of the switch (SCDS) shown in FIG.
To explain the subroutine of F, first, it is determined in step (#1550) whether or not the mode setting card is installed, and if it is not installed (b2 of (20) 1 = O), the process returns. If installed (b2 of 20H =
1), the flag (CDSF) is set in the step (#1555) of determining whether the switch (SCDS) is operated and the flag (CDSF) indicating that the flow of the relevant (5CDSONI) has been executed is set. If the flag (CDSF) is not set, return (#1555).If the flag (CDSF) is set, press the switch (SC) to enter or release the data setting mode.
D8) is ON, OL? In order to determine either of these, it is determined whether the flag (SETF) indicating the data setting mode is set (1
1560). As a result, if it is determined that the flag (SETF) is set, step (#15
70), and then in step (#1572) the flag (WRT) indicating data writing to the E2PROM is reset.
F) and the data setting mode has been canceled by operating the switch (S CD5), step (
#1575) resets the flag (CDSF) and cancels the data setting mode. If it is not set, this flag (
SETF) (#1565), resets the flag (CDSF) (#1575), and returns.

After completing the key setting control shown in FIG. 12 in the above manner, the microcomputer (μC) moves to step (#
Step 440) proceeds to step (#445) where photometric data is input from the photometric circuit (LM) to create a spot photometric value to be used for exposure. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 11 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG. 19. In FIG. 19, the microcomputer (μC) first determines in step (#1600) whether or not a flag (AELF) indicating AE flock is set, and if the flag (AELF) is set,
Returns because the photometric value is not updated. Flag (A
ELF) is not set, the terminal (C3L
M) to "H" level, commands the photometric circuit (LM) to output photometric data, and performs serial communication (#1
605. #1610).

Through this communication, the brightness values (Bvl to By4) of the four photometric ranges shown in FIG. 11 are input. When communication is completed, set the terminal (C3LM) to “L” level (#1615)
. Then, in the next step (#1620), it is determined whether spot photometry is selected, and if it is selected (Fb12=1), the brightness value (Bv
2) is set as the spot value (Bvsp) (#1660).

When in multi-point mode (Fb12=O), step (#
1620) to (#1622), it is determined whether a flag (AFNF) indicating that the AF mode is not set is set, and further, a flag (LCONF) indicating that focus detection is not possible is set in step (#1624). If either one is set, the small metering range (LM2) in the center is set to the spot value (B
vsp). When the flag (AFNF) and (LCONF) are not set, the image magnification β is calculated based on the distance information and focal length information input from the lens.
is calculated from β=focal length/distance (#1625), and in the next step (#1630), it is determined whether this image magnification β is greater than or equal to a predetermined value (KB), and the subject that occupies the shooting screen is determined. determine the size of

If it is more than the predetermined value, the object is considered large and the step (#
1640), each photometric range (LMI), (LM2) (L
M3) brightness values (Bvl), (Bv2), (Bv3
) is taken as the spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF - AF
The range is determined by whether the flag (AFIF) is set, and if the flag (AFIF) is set, the brightness value (Bvl) of the photometry range (LMI) is determined, and if the flag (AF2F) is set, the range is determined. is the brightness value (Bv2) of the photometry range (LM2), and when neither flag is set, that is, when the day focus amount of the third island (AF3) is selected, the brightness value (Bv2) of the photometry range (LM3) is B
v3) respectively as spot photometric values (Bvsp) (#1
645~#1665). Then, it is determined whether or not focus is achieved, and if in focus (AFEF=1), the AE flock flag (AELF) is set to perform AF-AE flocking, and if not in focus (AFEF=O), the AE flock flag (AELF) is set to perform AF-AE flocking. A
ELF) and return.

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (#450) in FIG. 6 and performs control regarding the AE flock, which will be explained with reference to the flowchart shown in FIG. 20. Furthermore, here,
To cancel the AE log, press the AE log switch (S AE
When L) is pressed once, the AE lock will loosen as long as it is pressed, and the AE lock switch (S AEL) will be pressed again.
There is a mode in which the AE frog is canceled when you press or the power self-hold is canceled (10 seconds hold mode), and an AE frog mode.
There are modes in which the AE lock state is maintained only while the log switch is pressed, and these modes are selected by the IC card. In Figure 20, microcomputer (μC)
First, in step (#1700), it is determined which of the two modes the mode is based on the E2FROM data (MSb5), and when it is in the 10 second hold mode, it proceeds to step (#1705), Determine whether the AE flock switch (S AEL) is turned on or not. If not, set a flag (AEONF) indicating that the AE flock switch was operated and the flow after step (#1705) was executed. Reset (#1
710), returns.

In step (#1705), if the AE flock switch (SAEL) is turned on, the above flag (AEO
NF) is set or not in step (#171
5), and if it is set, return immediately.

If it is not set, proceed to step (#1720) and flag (
AELF) is set or not, and the flag (AELF) is set.
If AELF) is not set, it is assumed that the operation was performed to perform AE flow, and this should be set #1730
), when the flag (AELF) is set, A
The flag (AELF) should be reset because the E-flock was operated to release it while it was operating (#1725), and the process goes to step (#1735), and the AE-flock switch (SAELF) is reset.
EL) is operated, a flag (AEONF) indicating that this flow has been executed is set, and the process returns.

In step (#1700), if it is not in the 10 second hold mode, in step (#1740)
Determine whether the flock switch (SAEL) is turned on or not, and if it is not turned on, set the flag (AELF)
(#1755). When it is ON, set the flag (AELF) (#1745), reset and start the power supply retention timer (T1) (#1745).
1750), return. In this way, when the AE flock switch (SAEL) is turned on, the power is maintained.

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs second data communication with the card in step (#455). This data communication will be explained with reference to FIG. 5(b). In step (#325), the microcomputer (μC) determines whether or not a card is installed, and if it is not installed (CkbO=O
) Returns without data communication. If the card is installed, set the terminal (C8CD) to rH” level.#
330), output data to IC card (CD) #3
35) indicates that the IC card is on the input side. After that, in step (#340) it is determined whether or not the IC card installed in the camera is a mode setting card, and if it is an IC card in data setting mode (20
b2 of H = 1), set the switch data that was sensed and memorized in step (#900) in Figure 12 #3
44), performs serial communication (#348), and outputs the switch information to the IC card (CD). After that, set the terminal (C8CD) to "L" level (#350),
Return.

In the judgment in step (#340), if it is not a mode setting card, that is, if it is a program card (20
H b2=o), set the exposure calculation data, flash data, and lens data that are necessary for exposure calculation, perform serial communication, and transfer these data to I.
Outputs to C card, sets terminal (C3CD) to "L" level, terminates data communication, and returns ($1346)
~#350).

Note that the data for exposure calculation is the photometric value (Bvs).

(BVAv), film sensitivity (Sv), and data indicating whether the film is positive or negative. Lens data includes focal length data, open F value (Av, ), and maximum aperture value (AvssJ), and flash data includes There is data indicating whether the flash is forced to fire or automatic, data indicating whether the flash is not attached (including when the power is off), GN (guide number), data indicating whether charging is complete, etc.

When the above-mentioned card data communication (II) is completed in FIG. 6,
The microcomputer (μC) proceeds to step (#460) and performs exposure calculation here.

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (μC) performs the step (#2
000), determine the amount of exposure (ΔEvl) to be constantly corrected from MSb32 to MSb34 of the E2 PROM, and add the manually set exposure correction amount (△Ev) to this to calculate a new amount of exposure correction. (#2001). Then, in step (#2002), it is determined whether the lens is attached or not based on the input lens data, and if it is not attached, the photometry value (BVAM) of the photometry range (LM4) is used as in the actual aperture metering. The shutter speed is calculated by adding the film sensitivity (Sv) and the exposure correction value (ΔEv) to the photometry value (which may be the photometry value averaged over the whole) and returns (#2005). If a lens is attached, perform exposure calculations according to each exposure mode (#2010~
#204.

Therefore, the exposure calculation for P mode is shown in Figures 23(a) to (c).
To explain it as shown in the figure, the microcomputer (μC) first
In step (#2100) of Figure (a), the backlight condition is determined using the photometric value (BVAM) of the photometric range (LM4) and the spot photometric value (Bvsp) obtained in step (#445).
Judgment is made based on whether the difference is 2Ev or more (#210
0). If it is 2Ev or more, it is determined in step (#2105) whether or not the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (FLOK) is set to r)( Make it J level (#2
110), enables flash photography and controls exposure value (Ev)
Ev from the photometric value (BVAM) of the photometric range (LM4), etc.
-BVAM+Av, +Sv -1+ΔEv (#2115). Here, the reason for subtracting 1 is to make the background look like backlight. This is to make the Ev over.

In addition, I am trying to properly expose the main subject using a flash from an electronic flash device. Then, the program 1 subroutine (#2) that determines the aperture value (Av) and shutter speed (Tv)
120) and return. This is shown in Figure 23(b)
The shutter speed control value (Tvc)
Tuned Tvm 7 (SS=1/125) Change the aperture value (Av) from the exposure value (Ev) to 7 (shutter speed)
The aperture value (Av) is 7 (F=11).
If it is larger, the control aperture value (
Avc) to 7 and return (#2215),
If the aperture value (Av) is 7 or less, the calculated aperture value (
Av) is smaller than the open aperture value (Avo). If it is, the open aperture value (Av, ) is set as the control aperture value (Avc); if not, the calculated value (Av) is set as the control aperture value. Return as (Avc) (#2220~
#2230).

Returning to FIG. 23(a), in step (#2105), if the electronic flash device (FL) is not ready to emit light, set the terminal (FLOK) to the "L" level.
5) In order to properly expose the main subject, control exposure value (E
v) from the spot value (Bvsp) of the photometry range, etc., Ev=
Find by Bvsp+ Avo +Sv+△Ev (#21
30), the program proceeds to subroutine (#2135) for determining the aperture value (Av) and shutter speed (Tv) and returns.

This is shown and explained in Fig. 23 (C). First, in step (#2250), the aperture value (Av) is set to Av=5/8Ev.
-25/8, and determine whether this aperture value (Av) is larger than the maximum aperture value (AVmsx) of the lens (#2255), and if it is larger, the maximum aperture value (AV-ax
) as the control aperture value (Avc) (#2260), and the process proceeds to step (#2280). In step (#2255), the aperture value (Av) is the maximum aperture value (AVaa
In the following cases, it is determined whether the aperture value (Av) is smaller than the open aperture value (Av,), and if it is smaller, the open aperture value (Av, ) is determined.
Av.

) as the control aperture value (Avc), and if it is not smaller, set the calculated aperture value (Av) as the control aperture value (Avc) and step (#
2280) (112265 to #2275).

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step ($12285), it is determined whether this is greater than the maximum shutter speed (TVmay), and if it is, the control The shutter speed (Tvc) is limited to (TVl18X) (#2290), and if it is not larger, it is determined in step (#2292) whether it is slower than the slowest shutter speed (TVs+n), and if it is slower, (Tvm:n) is the control shutter speed #2293), and if it is not slow, the calculated shutter speed (T
v) as the control shutter speed (Tvc) (t122
95), return.

Returning to FIG. 23(a), in step (#2100), when the difference between BVAM - BvSp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), and the average of the photometry range (LMI) to (LM4) is Photometric value (Bvl+Bv
2+Bv3+Bv4)/4 to find the exposure value (Ev) and detect whether the flash device is ready to emit light (
#2150).

When the light emission preparation is complete, step (#2155)
Proceed to Step 3 to determine whether or not the flash photography auto mode is in which the presence or absence of flash photography is automatically determined, and if it is in the auto mode, determine the aperture value (Av) and shutter speed (Tv) using the program ■ above. (#2160), the shutter speed (Tv) is the camera shake warning speed (Tvm6,176
0) (#2165). If the speed is less than the camera shake warning speed, proceed to step (#2170) to perform flash photography as a low speed, and also proceed to step (#2170) to perform forced flash photography even when not in auto mode in step (#2155). .

Then, set the aperture value (Av) during flash photography using program ■.
Then, determine the shutter speed (Tv) and set the terminal (FLOK) to r) ($12,175 for J level) to enable flash photography.

However, in step (#2150), if the preparation for emitting light is not completed, proceed to step (#2180) for shooting with constant light, decide the aperture value (Av) and shutter speed (Tv) according to program F
LOK) is set to "L" level (#2185) and returns.

Also in step (j2185), the shutter speed (
When Tv) is 7 or more (synchronized speed or more), the process similarly proceeds to step (#2185) and returns.

Next, Fig. 24 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether the electronic flash device is ready to emit light. , if the light emission preparation is complete, set the control shutter speed (Tvc) to 7 (1/125) and connect the terminal (F
LOK) is set to r)(J level, and the set aperture value (Av) is returned as the control aperture value (Avc) (#2300
~ #2310 and #2345). If the flash preparation is not completed, calculate the exposure value (Ev) from the average metering value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (#2315. #232) .

Then, in the next step (#2325), the shutter speed (Tv) is set to the maximum controllable shutter speed (Tv
It is determined whether the maximum shutter speed (TV's) is larger than □

) as the control shutter speed (Tvc) in steps (#
2340). If not, it is determined in step (#2331) whether the speed is lower than the lowest controllable speed (Tvs +.), and if it is low, (TVs+n) is controlled in step (#2333). The shutter speed is set as (Tvc), and if the speed is not lower than (TV@+.), the calculated value (Tv) is set as the control shutter speed (Tvc) in step (#2335), and each step (#2335) is set as the shutter speed (Tvc).
2340). In step (#2340), the terminal (
FLOK) to “L” level, and proceed to the next step (#23
45), the set aperture value (Av) is the control aperture value (Avc).
Make it so that

Next, the control in S mode is shown in FIG. 25 and explained. First, in step (#2400), the exposure value (Ev
) is calculated from the average photometric value, etc., and it is determined in step (#2405) whether or not the light emission preparation is complete. If the light emission preparation is complete, the terminal (FLOK) is set to "H" level (
#2410).

Next, in step (#2415) the shutter speed (Tv
) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is controlled.
) and $12420), if it exceeds 7, the synchronization speed is 7
is set as the control shutter speed (Tvc), and the process proceeds to step (#2430).

In step (#2430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the determined exposure value (Ev), and this aperture value (Av) is determined as the maximum aperture value (Av).
). If it is smaller, the control aperture value (Av, ) is set as the open aperture value (Av, ) (#2440) and the process returns. On the other hand, the aperture value (A
v) is not smaller than the maximum aperture value (Av, ), it is determined whether it is larger than the maximum aperture value (AVmsx) (#2445);
w) as the control aperture value (Avc) (1i2450), and if it is not large, the calculated aperture value (Av) is the control aperture value (Av
Return as c) ($12455).

In step (#2405), if the light emission preparation is not completed, the set shutter speed (Tv) is set as the control shutter speed (Tvc) and the terminal (F
LOK) is set to "L" level (#2465), the process proceeds to step (#2430), and the subsequent flow is executed.

Next, when the mode is M mode (see FIG. 26), it is determined in step (#2500) whether or not the light emission preparation is complete;
If the process is not completed, set the terminal (FLOK) to "L"level; if it is completed, set the terminal (FLOK) to "H" level, and proceed to step (#2515).
The preset aperture value (Av) is returned as the control aperture value (Avc), and the shutter speed (Tv) is returned as the control shutter speed (Tvc) in the next step (#2520).

Returning to FIG. 6, after completing the exposure calculation (#460), the microcomputer (μC) of the camera performs the third data communication with the IC card (CD) (#465). FIG. 5(c) shows a flowchart of this control. First, the terminal (
Set the IC card (CD) to "H" level and
Performs serial communication with the IC card (#360) and transfers the IC to the IC card.
Notify that the C card is on the output side (#360).

At this point, waiting for a while (#365), serial communication is carried out and IC cart (CD) 7! +' Enter data L (#
370), terminal (C8CD) after completing Kono data communication.
Set to "L" level and return.

In this flow, the data sent from the IC card (CD) is different when the IC card is a mode setting card and when it is a program card.
First, in the case of a mode setting card, there are mode setting data and display control data that determines whether or not to display. In other words, ■ shutter speed for control (C-Tvc), ■ aperture value for control (C-Avc), ■ presence/absence of flash emission, ■ setting/not setting flash dimming to full emission (Ful1 emission), ■ card. There are 7 lines of data that perform control. (See Table 7) After completing this card data communication (III) in Figure 6,
The microcomputer (μC) executes the card control flow of step (11470). Based on the data you entered, this flow will
Figure 27 shows how to determine whether or not to control the camera using the microcomputer (μC), and how the camera operates when the card function is selected. Step (#260)
2) and the card function is selected (CDFN
When F=1), proceed to step (#2605). On the other hand, the card function is not selected (CDFNF=0)
Sometimes the function bit (7) in step (#2677)
(Fb9) and (FblO) are each set to o, the dimming level change amount (FΔEv) is reset in step #2680, and the process returns. When the card function is selected, it is next determined whether or not a program card is installed, and if a program card is installed (20H
(7) b2=O) indicates whether or not the camera can be controlled by the IC card in step (#2610).
The judgment is made based on the data input from the CD. Then, in step (#2605), it is not a program card (20
b2-1) of H or in step (#2610)
If the camera is not controlled by the C card, step (#
2677) and then proceeds to step (#2680).

If it is determined that the camera is controlled by the C card, the control aperture value (Avc) and control shutter speed (Tv
c), The presence/absence of Ful1 light emission, the presence/absence of flash light emission, etc. are determined by the data input from the IC card (
#2615 to #2645). Next, it is determined whether or not the flash light emission mode is in use based on the input data (#2650), and if it is not the flash light emission mode, the terminal (FLOK) is set to the "L" level (#2685), and the process proceeds to step (#2680). When in flash mode, set the terminal (FLOK) to “H”.
112655), and detects whether or not it is in the Full 1 light emission mode (#2660). Then, when it is in the Full1 light emission mode, the terminal (Full) is set to r)('' level in step (#26f35) and returns, and the Fu
When not in lL emission mode, connect the terminal (Full) to rL
J level #2670), dimming level value change amount (
c-pΔEv) (#2675) and return.

In FIG. 6, when the routine for determining and controlling the camera using the IC card as described above (#470) is completed, the process moves to display control (11472).

Table 9 shows the contents of data sent from the microcomputer (μC) to the display control circuit, so to explain this first, the shutter speed and aperture value are set to set or calculated values. The display of various modes is set according to the mode set at that time. AE mode display is b
O and bl are the currently selected modes, and b2 to b4 (display data corresponding to the change mode ■) are set by reading data from F and 2PRo. Data for the card display and data change display is set according to the currently set mode.

b7 (spot/multi-point forced display) is set to "1" when the flag (multi-point/spot display) is set, and indicates the multi-point/spot display on the display section (DISh) on the camera body. When each mode is forcibly selected (spot AF by program card or spot AF by multi-point switch (SQ)) using a display indicating that mode change is possible, it becomes impossible to change multi-point/spot mode. Regardless, multiple points or spots are displayed.

In the display control circuit (DISPC), when b7=1, multi-point or spot display is performed according to the bO signal.

The number of films is set to the number of films at that time, and the display data of the state at that time is also set for the patrol and tongue display.

The C card related mode display is (I) r bOJ,
It is set according to the installed card, and other (
(Engineer, II, III) are set from the E2 PROM (except when setting data), and when setting data, the change mode data sent from the IC card is set. The controls are set according to the camera sequence.

The display control circuit (DISPC) determines what to display based on this control data. The LED is
Data is set when needed for display. Display control is shown in FIG. 28 and will be explained.

First, the microcomputer (μC) determines in step (#2700) whether or not a flag (CDFNF) indicating whether the card function is working is set. If it is set, the next step ( #2710) ~ (#272
In step (#2710), it is determined whether a flag (CDIF) indicating that the path 0) has been passed once is set. If the flag (CDIF) is not set, set it in step ($12715) and display the functions added by the card when the card function changes from not working to working. Step (#2) flag (DISPIF) to perform for a certain period
720) and proceed to step ($12725), when the card function is not working (CDFNF = O
), perform steps (#2710) to (#2720) 1
Step the flag indicating that the passage has been completed (#2705)
to reset and proceed to step (#2725), or if this flag (CDIF) is set, proceed from step (#2710) to step (#2725) without doing anything.

In step (#2725), the above flag (DISPI
F) is set, and if it is set, it is determined in step ($12727) whether the card type is a program card, and if it is a program card, rPROJ, the card is In step (#2728), mode data indicating the display of rcARDJ indicating that it is working is created. Note that the display in this case is as shown in FIG. 35(a).

Specifically, the display register (RAM) address (O
b5 of AH). b6 is r 1.04, b1
Let ~b4 be rQJ.

Thereby, the display control circuit (DISPC) reads this data and displays it on the display section.

If it is not a program card, that is, if it is a mode setting card or if the card is not loaded, step (#272
OAH b5.9) is used to display data as shown in FIGS. 34(a) to (e) using the card functions set in the camera. b8=1.1, b1~b4=0
shall be.

Note that the display data and display contents change depending on the set contents.

If the flag (DISPIF) is not set in step (#2725), it is determined in the next step (#2730) whether or not to perform display control using a card, and if display control is performed using an IC card (CD), OAR b5. is used to display data according to the mode setting data input from the IC card. b6=o, bl~b4=0
(#2735).

When there is no card display control signal from the IC card in step (#2730), the process proceeds to step ($12736), and it is determined whether the write flag 0IRTF to 82FROM is set. Write flag (WR
TF) is set, that is, when the data setting mode using the card ends, the process advances to the mode setting subroutine (#2737) and mode setting is performed. Further, the process proceeds to step (#2740), and b5.
b6=O.

1. Set b1 to b4=o. If the card function is not working (CDFNF=O), data is created to set bo=o at address OAH so that the "card" display is deleted.

Each step (#2728), (#2729), (#
2735) and (#2740), the presence/absence of focus display is determined by the flag (A
F E F), presence/absence of focus detection failure display is a flag indicating that focus cannot be detected (LCONF), presence/absence of display indicating continuous or tracking is a flag indicating tracking mode (following F), or continuous AF (Fb8)
, multi-point distance measurement/spot distance measurement uses a bit indicating the function (Fb2
), S LON, OFF is 5LON, bO of address 0CR (according to the flag (SIONF) indicating OFF)
~b5 are set respectively.

In addition, in the display control circuit (DISPC), the switch (Sl
) is OFF, the infinder display is turned off regardless of the signals (bO to b4).

Step (#2728) (#2729) (#273
5) In all cases of (#2740), step (
Step #2745) sets the terminal (C3DISP) to "H" level in order to perform data communication with the display control circuit (DISPC), and then in step (#2750) serial communication (camera output side) is performed to communicate. After finishing, connect the terminal (C3
DISP) is set to "L" level (#2755).

Next time the card function is activated, it is determined in step (#2760) whether or not a flag (DISPIF) indicating a certain period of time display is set, and if it is set, wait 2.5 seconds (#2765) . Display is performed during this time.

Next, in step (172770) the flag (DISPIF
) and proceed to step (#2780). If the flag (DISPIF) is not set in step (#2760), skip steps (#2765) and (#2770) and proceed to step (#2780).
). In step (#2780), it is determined in step (#2780) whether the control shutter speed (Tvc) is less than 6 (1/60), and if it is less than 6, a mode for issuing a buzzer warning is selected. Determine whether or not there is (
#2785). If selected (MSb9 to MSb1
2 = OH, 2H, 4H, 61 (, 8H, AH, CH
, EH) is connected to the terminal (OBZ
) to output a pulse of a predetermined frequency for a certain period of time #27
90), proceed to step (#2792).

When the control shutter speed (Tvc) is 6 or more or the mode does not provide a buzzer warning (MSb9 to MSb1)
2 = IH, 3H, 5H, IH, 9H, BH, DH, F
For H), proceed to step (#2792) without issuing a buzzer warning.

In step (#2792), the camera function indicated by the input mode setting data is stored in the E2FROM (7) MSb.
A flag indicating whether to write to O~MSb12 (WRT
F) is determined, and if it is set, step (#27
94), the above mode setting data, ie, b1 to b4 at address 22H, bo to b2 at address 23H. b4-b7 address 24
Sb3.MSb5 to MSbQ- of g2 PROM
MSb12. Write to the bit according to the data contents of MSb26 to MSb34) and step (#2796)
The flag (WRTF) is reset with , and the process returns. If the flag (WRTF) is not set in step (#2792), the process returns directly.

The above mode setting subroutine (#2737) is the 30th
To illustrate and explain it in the figure, here, it is determined whether the mode currently set on the camera is in the newly set mode or not, and if it is not, it is moved to another set mode. There is. For example, if A mode is currently selected for exposure, but if A mode is removed from the exposure mode selection by an IC card, the A mode remains as before.
It would be strange to display and control the mode, so this is prevented.

Now, in the flow of Figure 30, the microcomputer (μC)
First, set the flag (CHGF) that is reset when there is a changeable mode (#3200), and check whether the settable exposure mode has been changed using the E2PROM data (#3200).
MSb6 to MSb8) and the data input from the IC card (CD) (address 23H bO to b2) should be compared and determined. To force the P mode, set the data (FbO, Fbl) to (0,0) #3
205), proceed to step (#3210).

Next, in step (#3210), it is determined whether or not there is an H/S mode, and if there is, (bl at address 22H = 1
), reset the above flag (CHGF), change the change data (CDbO-CDb2) indicating the change position as H/S change (0, 0, O), and proceed to step (#3230) (#3220. #3225) .

If there is no H/S mode (bl at address 228 = O
) is the data (Fb6. Fb7) (0,0)(7)
) No I/S (#3215), step (#32
Proceed to step 30).

In step (#3230), it is determined whether or not there is a 10/- mode, and if there is (b2 of address 22H = 1),
It is determined in step (#3245) whether the flag (CHGF) is set or not, and if it is set,
Reset the flag #3250) and step (#3250)
3255) to change the changed data (CDbO to CDb1) +/
- Proceed to change (001) and shite step (#3260).

If the flag (CHGF) is not set in step (#3245), step (#3250), (#
3255) and go directly to step (#3
260).

In step (#3230), if there is no 10/- mode (b2=o of address 22B), no correction is made,
The function data (Fb4. Fb5) is set to (0, 0), the corrected exposure amount ΔEv is set to 0, and the process proceeds to step (#3260) (#3235. #3240).

In step (#3260), it is determined whether or not there is an S/C mode, and if there is (b3 of address 22H = 1), it is determined in step (#3270) whether or not the flag (CHGF) is set. If it is set, it should be reset (#3275), and the changed data (CDbO
~ CDb2) as (0, 1, 0) and the next step (#
3285).

When the flag (CI(GF)) is not set,
Skip steps (#3275) and (#3280) and proceed directly to step (#3285). Step (#
3260) and there is no S/C mode (address 22
For b3=o of H, step (#
3265), the function data (Fb3) is set to (0), and the process proceeds to step (#3285). Step (#3285)
Now, determine whether there is S/A mode or not, and if there is (
b4 = 1 at address 22H has step (#3
295), it is determined whether the flag (CHGF) is set, and if it is set, the flag (CHGF
) (#3300) and proceed to the next step (
#3305), change data (CDbO
-CDb2) is returned as (0, 1, 1). If the flag (CHGF) is not set in the previous step (#3295), there is no mode that can be changed.
3310), change data (CDbO to CDb2) to (1
, O, O).

Also, if there is no S/A mode in step (#3285) (b4 of address 22B = o), in step (#329
0), the function data (Fb2) is set to (0) and returned to set the multi-point ranging mode (A mode).

When the display control (#472) described above in FIG. When there is no (IP7= rHJ
), permit interrupts and return (#474). O
When it is N (IP?=r L , ), it is determined in step (#475) whether the self mode is set or not by checking whether the self mode selection switch (SSELF) is turned on. If the switch is turned on (IP12=
rLJ ), step (#
478). This subroutine is shown in FIG.

First, the microcomputer (μC) stops the AF motor in step (#4500). This is because when taking self-shots, the subject may not be present and the background may be in focus, so AF operation is prohibited. (for this reason). Next, internal E2
A signal indicating a self timer time is read from the PROM (#4505). Next step (#4510
) to determine whether 28 is selected, and if 28 is selected here (MSb30.31 = 0.0)
In step (#4515), the process waits for 2 seconds, returns, and proceeds to step (#490) in FIG. 6 to perform exposure control (#495).

Similarly, when 58 is selected, 5 seconds, 108
is selected, wait 10 seconds and return to step (#490) in Figure 6 to perform exposure control.
Proceed to (#4520 to #4530).

If it is not the self mode (IP12 = rH") in step (#475) of Fig. 6, step (#480)
Proceed to.

In this step (#480), it is determined whether the mode is manual focus mode [:MFF=1 (focus lock or manual focus adjustment with focus detection only)],
In manual focus mode, step (#4
90) and proceed to (#495) to perform exposure control.
If it is not the manual focus mode (A mode), the process proceeds to step (#485).

In step (#485), a flag indicating focus (AFEF
) is set, and if it is not set, returns without performing exposure control.

When the flag (AFEF) is set or when not in AF mode (i.e. in manual mode)
In step (#490), interrupts to this flow are prohibited, and in the next step (11495), exposure control is performed (described later), and in step (#500), the film is wound one frame (this (described later), release switch (S
2) is ON or not in step (#505), and
In the case of N (IP7=rLJ), it is determined in step (#510) whether or not it is continuous shooting mode, and when it is in continuous shooting mode (Fb3=1), all interrupts are disabled in step (#515). Allow it and proceed to the [SO] routine. When the continuous shooting mode is not set (Fb3=0), the process returns to step (#505) and waits for the release switch (S2) to be turned off. When the release switch (S2) is turned off, all interrupts are enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (#495) is shown in FIG. 31 and will be described. First step (#280
0), it is determined whether charging is completed based on the data input from the flash device (ST), and if charging is completed, the terminal (C8
ST) is set to r)(J level during (t2), indicating that it is in exposure mode.Then, the amount of light adjustment is set to film sensitivity (Sv), exposure compensation amount (△Ev), and flash light emission from the IC card. The amount of correction (FΔEv) is calculated, and this is output after D/A conversion as analog data to the dimming circuit (STC) (#2810).

In the next step (#2815), the control aperture value (Avc
) After performing aperture control and controlling mirror up (#2820), control shutter speed (Tvc)
Control the shutter speed based on (#2825)
, further set the Ful1 light emission signal terminal to the "L" level (#
2830), return.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on Figure (b), during flash photography, the terminal (FLOK) is at the "H" level, and when the front curtain of the shutter completes travel, the X contact turns ON, and the AND circuit (
The light emission start signal from AND21) is sent to the electronic flash device (ST).
The electronic flash device (ST) inputs this and starts emitting light. When not in Ful1 flash mode,
"H" level is output to the AND circuit via the inverter (IN21), and when a pulse signal indicating the completion of dimming from the dimming circuit (STC) is input, the AND circuit (AN
D22) outputs this to the flash device via the OR circuit (OR21).6 In the electronic flash device (ST), this is input to stop the flash emission. In the Ful1 light emission mode, the "L" level is input to the AND circuit (AND22), the AND circuit (AND22) becomes inactive, and the passage of the dimming signal is prohibited, so the electronic flash device (ST) In this case, no signal indicating the stop of flash emission is output.

Figures 32(a) and (b) show the steps (#) in Figure 6.
500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this, in Fig. 32(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (
T3) is reset and started (#2850. #2
855).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) switches (SWD) to indicate that one frame has been wound in the step (#2860).
It is determined whether or not the motor is ON, and if not, it is determined in step (#2865) whether 2 seconds have elapsed in this state, and if 2 seconds have elapsed, the motor is controlled to stop ( #2870), assuming that the film is taut, control the film tautness (li2875),
Return. The above-mentioned tension subroutine is shown in FIG. 32(b) and will be explained. In step (#2920), it is determined whether or not auto-return (automatically rewinding the film after tension is selected) is selected. (MSb9~MSb12=OH~3H,8H-BH
l (Here, H is a hexadecimal number): Give a motor reversal signal to the motor control circuit (MD) and wait for the film detection switch (SFLM) to turn on (#2930.
#2935).

Next, when the switch (S FLM) is turned OFF, it is determined whether or not the entire film is rolled into the cartridge chamber, and if the film is rolled up (E2PROM (7) MSb9 to MSb1
2=21(,3H,6)1.7H,AH,81-1,
EH, FH), wait one second (#2945), perform motor stop control (#2955), and then return.

Unless it is involved (E2PROM MSb9 to M
Sb12=Of(,LH,41(,51(,81-!
, 9) (, C) I, D) l), Wait 0.2 seconds, stop the motor, and return (#2950).

When the above step (#2920) is not auto-return (MSb9 to MSb12 = 41 (~7H, CH-F
)l) proceeds to step (#2925) and waits for the rewind switch (SWD) to be turned on, and if it is turned on, proceeds to step (#2930).

Returning to FIG. 32(a), when the 1-frame winding completion switch (SWD) is turned on in step (#2860), the motor is stopped in step (#2880), and then the next step ( In step #2885), it is determined whether the counter for the number of film sheets is a forward count type or not. If it is a forward count type (MSb9 to MSb12 = OH-7H), the counter that indicates the number of film shots is counted in step (#2890). Increment the number (N1) by 1,
Also, if it is a backward calculation formula (MSb9 to MSb12 = 8H
-FH) is a count number (N
1) by 1, and step (
Proceed to #2900). In step (#2900), this number of films (N1) is set to MSb13~ of E2PROM.
Write to MSb18.

Next, when the back cover close detection switch (SR) or the rewind switch (SRW) is operated, the terminal (INT2)
A pulse signal is input to the microcomputer (μC), and the microcomputer (μC) executes the interrupt (INT2) shown in FIG. In the flow shown in the same figure, the microcontroller (μC) first prohibits interrupts to this flow (#3000), and then steps (#3000).
05), it is detected whether the rewind switch (SRW) is turned on. If it is ON, execute the [Rewind] routine shown in FIG. 32(b) to perform the rewind operation, permit interrupts, and return (#301).
0). If the rewind switch (SRW) is not turned on, it is assumed that the back cover closing switch (8RC) is turned on, and the process proceeds to step (#3015), where it is determined whether or not there is a film. If there is no film, therefore, if the film detection switch (SFLM) is OFF, the process proceeds to step (#3100) without performing initial loading.

In contrast, if a film is present (i.e. 5FLH
is 0N (7)), set the terminal (C8DX) to "H" level, perform serial communication with the film sensitivity reading circuit (DX), and input the film sensitivity data (Sv) and the number of film exposures (N). , When communication is finished, the terminal (C3D
X) to "L" level (#3020 to #303).

Then, set the number (N1) to -2 (#3035),
Next, the terminal (C8DISP) is set to the "H" level, serial communication is performed with the display control circuit (#3045), and the signal indicating the initial load (OAI (bl = 1. b2
~b6=0) and the number of films are output, thereby preventing data other than the data indicating the number of films (N1) from being displayed. When serial communication is finished, the terminal (C8
DISP) is set to "L" level (#3050). The value of the number of films (N1) is displayed using two 7 segments.

Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (#3055), waits for one frame to be wound (#3060), and when the one-frame winding switch (SWD) is turned on, the number of films ( N1) to 1
is added, and it is determined whether or not it becomes 1. If it is not 1, the process returns to step (#3040). If it is 1, proceed to step (#3075) to stop the motor, and further determine in step (#3080) whether or not the film counter is a forward counting type, and if it is a forward counting type,
In step (#3085), set (N1) to 1, and if it is not a forward calculation method, set the number of film shots (N) read in step (#3090) to (N1), and then in step (#3095)
Proceed to. Then, in step (#3095), the number of films (N1) and the film sensitivity are written to a predetermined address of the E2PROM, and after the writing is completed, all interrupts are enabled ($3100) and the process returns.

It should be noted here that in this embodiment, setting and resetting the flag and setting the bit to 1.0 are the same.

In the above, the microcomputer (μC) on the camera side of this embodiment
The operation of this camera has been explained using various flowcharts, etc. Next, the control of the IC card installed in this camera will also be explained using flowcharts. Note that the mode setting card and program card will be explained separately.

The IC card (CD) has a built-in microcomputer (μC2) with a built-in E2 FROM.

First, let's start with the mode setting card.
When D) is attached to the camera, power is supplied and as mentioned above, an interrupt is applied to the camera's microcomputer (μC), a clock (φ) is sent, and the microcomputer (μC2) on the IC card side becomes drivable.

On the IC card side, the terminal (RE) is connected by attaching it to the camera.
A signal changing from "L" to "H" level is input to the microcomputer (μC2), and the microcomputer (μC2) executes the flow shown in FIG. 40(a). In the same figure, the microcontroller (μC2) first resets the flag output port and transfers the E2PROM data to RA.
It moves to the bit corresponding to the content of the data among the bits of M (#CD10), and waits for an interrupt (#CD15).

A signal from the camera indicating a data communication request (C3BCK)
When the microcomputer (μC2) of the IC card executes the interrupt [INT], this is shown and explained in FIG. 40(b).
50) to perform serial communication with the camera, and the data communication clog (SCK) sent from the camera.
Based on the input data from the camera, determine the number of data communication (I, n, I[I) (#
CD55). If it is a data communication card, first set the data that indicates to the camera what type (mode setting or program) the IC card is (in this case, the mode setting card), and then use the clock sent from the camera. (
SCK), output the data based on (#CD60),
Wait for an interrupt (#CD63). If data communication is ■, step (#CD70) to step (#CD7
Proceed to step 5) and input the data sent from the camera (key data in this case) in synchronization with the Glock (SCK). Based on this input data, the data set routine (#CD75) is executed and the interrupt wait is performed (
#CD63).

This data set routine is shown in FIG. 40 (C) and will be explained when the card data setting switch (SCDS is
It is determined in step (#CD100) whether or not the switch is ON or OFF, and step (#CD100) is performed depending on whether the switch is ON or OFF.
After each control is performed in steps #c0110 and #CD105), the process proceeds to step (#CD115). (SC
DSON) [:5CDSOFF] (7) The control flow is shown in Fig. 40 (e) and (f), and this control is
), ESCDSOFF) and the comparison step (
The steps of #1500) and (#1550) for determining the mode setting card are not included (this is unnecessary on the card side), and the rest are the same, so the explanation will be omitted.

The flag has a C at the beginning to distinguish it from the camera-side flag; its function is the same as that of the camera-side flag without the C.

Returning to FIG. 40(c), in step (#CD115), it is determined whether the set flag (C3ETF) is set or not, and if it is not set, (5CDS
The flag (C
CDSF) is set or not.
D120).

In this embodiment, the card data setting switch (scDS)
is set to OFF to enter the change mode, and when the flag (C8ETF) is not set in step (#CD115), it indicates that the setting has not been changed yet, but has been changed.

When the flag (CCDSF) is set, the display control flag (DISPCF) is set to L (#CD1
25) If the flag (CODSF) is not set, reset it (#CDL30) and return.

By setting and resetting this display control flag (DISPCF), it is determined whether or not the camera side display will be the display in the data setting mode [Step (#273 in Figure 28)]
0):]. Step (#CD115) Te, 7'7g (C
3ETF) is set, execute the flow of data set I for data change and step (#CD
125) (#CD117).

Here, the flow according to the operation of the data set ■ will be explained.

In Fig. 40(d), the card switch (SCD) is set to O.
Check whether it is set to N or not (#CD135), and if it is set to ON, check the bit that stores the change mode (#CD135).
CCkbo-CCkb2), determine the current change mode, change to the next mode and return (#CD
140).

At this time, the above bits (CCkb15 to CCkb17)
Also change the data. When the switch (SCD) is not turned on, determine whether the up switch or down switch is turned on #CD145. #CD
155), if these switches are ON, execute the flows of data sets (2) and (2), respectively, and return (#CD150, #CD160). If both are not turned on, return without doing anything.

Next, data set ■ is shown in FIG.
The bit (CCkb3 to
CCkb22), the current number is determined and changed to the next number. For example, in mode I, the current number is r
OJ (H/S, exposure compensation, drive mode S/C
(4 changes of 1-spot AF/multi-point AF are possible), rlJ (among the 4, spot/multi-point AF cannot be changed). Data set (2) is almost the same as data set (2) above, and the only difference is that the number progression is reversed, so it is not shown.

Next, the case of a program card will be explained.

In this embodiment, the program card is a sports program that is effective when a user wants to take a picture of a sports scene being played.

Now, when the IC card is inserted into the camera, a signal that changes from "L" level to "H" level is input to the RESET terminal of the microcomputer (μC2) on the card side, and the microcomputer (μC2) of the IC card Execute the flow of [reset] shown in the figure, reset the flag and vote in step (Ql), and wait for an interrupt (Q2).

When the C3BCK signal is input from the camera, an interrupt is generated and the flow (INT) shown in FIG. 42 is executed.

The microcontroller (μC2) of the IC card performs data communication based on the clock (SCK) sent from the camera (
Q5's. The data at this time is data used by the camera to inform the card side of the type of communication.
The microcomputer (μC2) of the card inputs this data and determines the content of the communication (Q51). If it is a data communication device, it serially communicates data indicating the type of card (in this case, it is a program card), the AF mode is continuous, and the metering zone is multi-point to the camera side. (Q52) outputs,
Proceed to step (Q5B) and wait for an interrupt.

Since this program card is designed for sports scenes, Continuous AF, which is always in focus, supports fast-moving subjects.
For the same reason, the metering zone has a wide metering range with multiple points, and the distance metering zone focuses on a moving subject, so a wide multipoint is desirable, but if the photographer wishes to sharply focus only on the main subject. Consider this and make it possible to switch.

If it is data communication ■, data necessary for exposure calculation is input from the camera (steps Q53 and Q54), and exposure calculation is performed and an interrupt is waited for (Q55).

Next, before explaining an example of a specific flowchart of exposure calculation, an overview of the control of this card will be explained.

◇Cards for outdoor sports and sports days◇ [Contents] You can take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake.

〔control〕

The control details for outdoor sports and sports day cards are shown in the program diagram of FIG. This control is performed as follows.

(a) The aperture value Av of the lens is calculated using the following formula.

When Rv<21, Av= (3/4) ・Ev -23
/4 When Ev≧21, Av= (1/2) ・Ev −
1/2, that is, when Ev<21, the shutter speed (Tv)
Open up the aperture to speed up the process. Therefore, Av
=(3/4) ・Calculate Kv -23ha.

When Ev≧21, the shutter speed (Tv) is already considered to be sufficiently high, so in order to smoothly change both (Av) and (Tv), Av-(1/2).
Calculate Ev-1/2.

Next, the open aperture values Avo and Av are compared. If the calculated value is smaller than Avo, the aperture value cannot be set to that value, so it is corrected to Avo.

Next, the shutter speed (Tv) is determined using the following formula.

When Av≧Avo, Tv=Ev−Av When Av<Avo, Tv=Ev-Av.

(b) If the film is a negative film, the shutter speed (Tv) is corrected to increase the shutter speed (Tv).

Negative film has a wide latitude, so use this to underexpose by about IEv and maintain a high shutter speed.

Reversal film (positive) has a narrow latitude, so no correction is performed.

(c) Others The above control is performed when a lens with a focal length of 70 mm or more is attached. The reason for this is that sports photography requires a relatively long distance from the subject, so it is thought that a telephoto lens will not be able to sufficiently photograph the subject, and if a telephoto lens is not used, the image magnification of the subject will be small. ,
Control is not performed because the probability of camera shake caused by moving the lens to follow the subject is low.

In this control, the flash is forced off and the flash does not fire automatically. The reason is that this program card is intended for shooting in relatively bright places.
This is because the distance to the subject is considered to be relatively large, so even if the flash is activated, it does not seem to have much of an effect.

Further, in this control, if the flash switch is forcibly turned on, no control is performed. The reason for this is that this control does not cause the flash to emit light for the reason described above, so if the control is performed when the flash is forced ON, it will go against the photographer's will to make the flash emit light.

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 43 and will be explained. In the figure, the microcomputer of the program card first determines the presence or absence of a lens based on the data input in step (3). Here, if the lens is not attached to the camera body, lens data such as the maximum aperture value (Av, ) will not be sent to the IC card. Therefore, since exposure calculation cannot be performed, the process proceeds to step [phase], and exposure control is left to the camera body. If the lens is attached, proceed to step (3) and check the focal length of the lens from the input data. focal length is 7
For lenses smaller than 0 mm, card control is not performed for the reason described above, so in this case too, jump to step 2 and leave exposure control to the camera body.

If the focal length is 70 mm or more, check the state of the forced flash switch based on the data input in step (2). When the flash forced light emission switch is ON, the card does not perform control for the reason described above, and therefore jumps to step [phase].

On the other hand, if the switch is OFF, proceed to the next step ■
The exposure value (Ev) is calculated by the sum of the spot brightness (Bvs) and the film sensitivity (Sv) of the input data. Then, the content of the control is changed depending on the value of the exposure value (Ev). For the reasons mentioned above, when Ev<21, Av=
(3/4) ・Step ■ from the equation of Ev -23/4
Find (Av). When Ev≧21, Av= (1/
2) ・From the equation of Ev 1/2, step ■ (Av)
seek.

(Av) calculated in step ■ and the minimum aperture value of the lens (
Av, , ) is compared in the next step (2). When Av≧AV*ax, the lens cannot be stopped down any further, so in step (2), the body control aperture value Avc is set to AVmay.

On the other hand, when Av (Avoax, Avc
=Av. In this way, after finding the aperture value Avc for body control, step [phase] takes the shutter speed (
Tv) is calculated based on the formula Tv=Ev-AvcO.

In the next step (2), this shutter speed (Tv) is compared with the maximum shutter speed (Tv, . . . ) of the camera. Here, when TV≧TVmax, proceed to step @ and set the shutter speed for body control (Tvc) to (TV
ssX). When Tv<Tv□, Tvc=Tv is set in step 0.

If Ev<21 in step (2) above, calculate (Av) using the formula shown in step (2), and then proceed to step (2).

In step [phase], (Av) calculated in step (2) is compared with the open aperture Avo. Here, Av>Avo
When , go to step ① to compare (Av) and (AVsax) <, When Av≦Avo, the lens aperture value cannot be opened any further, so go to step [phase]. Let the body control aperture value (Avc) be (Av, ). Then, further in step O, Tv==Ev −Av
The shutter speed (Tv) is calculated from the formula c.

For the reason mentioned above, if the film is a negative film, the shutter speed (Tv) must be corrected, so the type of film is determined in step [phase].

As a result, in the case of a reversal (positive) film, the process proceeds to step (2) to prevent the shutter speed (Tv) from becoming extremely slow.

On the other hand, in the case of negative film, proceed to step [phase],
It is determined whether the shutter speed (Tv) is smaller than 9 or not. When TV≧9, the body control shutter speed (Tvc) is set to (Tv) in step [phase]. TV
When <9, the process proceeds to step [phase] and further determines whether the shutter speed (Tv) is 8 or more.

Here, when TV≧8, Tvc=9, step @), Tv (when 8, step ■, Tv=Tv+1
Perform the following correction and proceed to the next step (■). In step (2), a comparison is made to limit the maximum value of (Tv) to Tv=-5 (30 seconds) in order to prevent the shutter speed (Tv) from becoming extremely slow.

Here, when Tv<-5, Tvc is set to -5 (Step 2), and when Tv≧-5, Tvc is set to Tv (Step [Phase]).

Since the flash is not controlled for the reason mentioned above, in step (2), a bit is set to turn off the flash.

After that, the process proceeds to step (3), the camera control uses the value calculated by the program card, and returns.

When the flow of these exposure calculations is completed, the process returns to the flow of FIG. 42 and waits for an interrupt.

At this point, there is an interrupt from the camera side, and at this time, if there is data communication (■), the calculated aperture value (CAv c ), e shutter speed (CTvc) data, and whether or not to control the camera using the card, and whether or not to force Full 1 emission ( Fb9=
O).

Prohibition of forced flash (FblO=O), flash control correction amount (CF
Data regarding the reset of ΔEv) is created, serial communication is performed, and data is output to the camera side. Note that the microcomputer (μC2) of the card stops during communications other than those mentioned above.

Here, the switches, their functions, various data, etc. that appear in the explanation of this embodiment are shown in Tables 1 to 12 below.

Table 1 Table 1 (continued) Table (a) Table (c) Table (d) Table (b) Table (e) Table Functional Data (Fbn) AM Table (continued) Table No. Table change data (CDbn) (RAM) Table card communication output data (C3bn Table data from card Table (a) Table (continued) Table (b) Table (b) (continued) Table data display RAM (Register) Table (b) (continued) Table (continued) Table 1 Theta Lens (I) Table 12 Camera lens information Table 11 Lens (II) In this example, the lens switch is used to lock the focus. When (S Q) is operated, steps #711 to #
Steps 712 and #713 check the value of the flag AFEF to determine whether or not it is currently in focus. In either case (in focus AFEF = 1 or out of focus AFEF - 0) Even if manual focus (M-FOCU) is selected in step #714 or step #799,
S) Proceed to routine (FIG. 10(d)). Since this routine first sets the flag MFF to 1 in step #4100, the flag MFF always becomes 1 when the lens switch (SQ) is operated. Therefore, in step #473 of the flow in Figure 6, the release switch (
When S2) is turned on, if it is not in self mode,
Exposure control (shutter release operation) is performed from steps #480 to #490 and #495. In addition,
In the case of the self mode, regardless of whether or not the lens switch (SQ) is operated, after the self processing of step #478 is executed, the process proceeds to steps #490 and #495 where exposure control is performed.

Note that if the lens switch (SQ) is not operated, steps #711 to #715 in FIG. 10(a)
, #717 and manual focus flag MFF
Reset to 0. If the focus is not impossible to detect, the flag AFEF is set to 1 only when the focus is in focus, as determined in step #765, and the flag AFEF remains O otherwise. Therefore, the sixth
At step #473 in the diagram, the release switch (32) is set to O.
If it is not in focus when N is selected (and when not in self mode) step #480, #48
5 and #520, and no release operation is performed. If the image is in focus, of course the process proceeds to step #490 and thereafter, and the release operation is executed.

As explained above, according to the present invention, even when the subject is not in focus, the operator (photographer) can drive the lens in the AF mode that prohibits the release until the subject is in focus. Once the shutter is stopped, the shutter can be released from then on, and the shutter release operation can be performed at any time as intended by the photographer.

[Brief explanation of the drawing]

The figures all relate to embodiments of the present invention, in which Figure 1 is a circuit block diagram of the entire camera, Figures 2(a) to 2(v) are diagrams showing the display form on the display section, FIG. 3 is a flowchart showing a camera reset routine when a battery is installed. FIG. 4 is a flowchart showing the initial set routine in FIG. 5(a) to 5(C) are flowcharts of data communication performed between a camera and an IC card attached thereto. Figure 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., Figure 6(a) is a detailed view of a part of it, and Figure 7 is a flowchart showing a routine for lens data processing. Similarly, FIG. 8 is a flowchart of flash data input. Figure 9(a) is a circuit diagram of an electronic flash device, and Figure 9(a) is a circuit diagram of an electronic flash device.
b) is a circuit diagram of the interface. FIG. 10(a) is a flowchart of the AF Calendar.
Figures (b) to 10(f) are detailed views thereof. 11th
The figure is a diagram showing a distance measurement range and a photometry range within a photographic screen. FIG. 12 is a flowchart showing the setting routine of the keys provided on the camera, and FIGS.
Figure (a), Figure 14 (b), Figure 15, Figure 16, Figure 1
7 and 18 are flowcharts showing specific setting routines for the various keys. FIG. 19 is a flowchart showing the photometric data creation routine, and FIG. 20 is a flowchart of the AE flow. Figure 21(a)
, FIG. 21(b) is a flowchart for setting the aperture and shutter speed. FIG. 22 is a flowchart of exposure calculation, and FIGS. 23(a) to 23(c), 24, 25, and 26 are flowcharts of each mode therein. FIG. 27 is a flowchart of control by an IC card (particularly a program card). FIG. 28 is a flowchart showing the display routine;
The figure is a flowchart showing the self routine. Figure 30 is a flowchart for mode setting, Figure 31 is a flowchart for exposure control, Figures 32(a) and 32(a).
b) is a flowchart relating to winding one frame of film, and FIG. 33 is a flowchart showing an interrupt routine relating to closing the back cover. Figures 34(a) to 34(e)
), and FIGS. 35(a) and 35(b) are diagrams showing display examples. FIG. 36 is a circuit diagram inside the lens, and FIG. 37 is an external view of the lens. Figure 38 is an example of the infinder display,
Figure 9 shows an example of the body display. Figure 40 (
Figures a) to 40(h) are flowcharts showing various routines for IC cards, Figures 41 and 42 are flowcharts particularly for program cards, Figure 43 is a flowchart for exposure calculation, and Figure 44 is a flowchart for the exposure calculation. It is a program diagram regarding a program card. FIG. 45 is a diagram corresponding to claims of the present application. (μC) (μC2) (CD) (SQ) Switch lens on the microcomputer IC card lens side of the microcomputer IC card in the camera body (Sl) AF start switch. Applicant Minolta Camera Co., Ltd. Agent

Claims (2)

[Claims] (1) A focus detection means for determining whether or not the subject is in focus; a lens drive means for driving the lens so that the subject is in focus according to the determination result of the focus detection means; and operation of a release switch. a release means for releasing the shutter according to the focus, a release prohibition means for prohibiting the operation of the release means until the focus detection means determines that the focus is in focus, and a lens drive stopper for stopping the lens drive by the lens drive means. an operating means; and a release means for operating the release means without operating the release inhibiting means when the lens drive stop operating means is operated. (2) The camera system according to claim 1, wherein the lens drive stop operation means is a switch provided on the lens side.