JPH03163539A - Camera - Google Patents

Abstract

PURPOSE:To photograph every one of plural objects at different positions in a distance direction in focus by automatically set the diaphragm of a lens so that the image of at least two objects out of the objects positioned in plural focus detecting areas may be formed in the depth of focus. CONSTITUTION:Plural focus detecting means are provided so that they may correspond to the plural focus detecting areas whose set positions are different from each other, and a depth of focus adjusting means is provided, which automatically set the diaphragm of the photographing lens so that the image of at least two objects out of the objects positioned in the plural focus detecting areas may be formed in the depth of focus. First, the control of diaphragm is performed by obtaining a depth priority F number by the use of the defocusing quantity DFd of a main object and a sub object obtained by focus detecting action. Next, the control of a lens position is performed by obtaining a correction defocusing quantity DFc by the use of the obtained depth priority F number. Thus, the photograph is taken in focus for the plural objects at different positions in the distance direction without necessitating a troublesome operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera capable of detecting a deviation of a photographic lens from a focal position of a subject.

[Conventional technology]

The above-mentioned camera is known as a so-called autofocus camera that automatically moves the photographic lens toward the in-focus position based on the detected deviation to perform focus adjustment.

In such autofocus cameras, a focus detection operation is performed on a specific subject to be photographed.
It is important to perform, for example, a focus adjustment operation based on the results, but depending on the photographing situation, it may be desirable to photograph a large number of objects located at different positions in the far and near directions with all of them in focus.

Therefore, in a camera equipped with a focus detection means for detecting a deviation from the in-focus position of the photographing lens with respect to a subject located within one focus detection area within the photographing area, there is a method for storing the detected deviation by the focus detection means. A storage means is provided, and a plurality of detection deviations detected while a plurality of subjects to be photographed are respectively located within the focus detection area are stored in the storage means, and then based on the plurality of detection deviations,
A camera has been proposed in which the photographing lens is moved to an intermediate position between the focus positions corresponding to multiple subjects, so that the multiple subjects can all be photographed in focus (for example, (See Japanese Unexamined Patent Publication No. 172126/1983).

[Problem to be solved by the invention]

However, the conventional camera described above has the following problems.

In other words, since the focus detection area is usually set in a relatively small central part of the shooting area, the conventional camera described above has multiple In order to perform the above-mentioned operations on a subject, it is necessary to perform focus detection operations for each of the multiple subjects by changing the posture of the camera many times so that the subject is located within the focus detection area. Not only is this operation cumbersome, but there is also the risk of missing a valuable photo opportunity while changing the camera's posture many times.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a camera that is capable of taking pictures of a plurality of subjects at different positions in the far and near directions, all of which are in focus, with excellent operability during shooting, and which can take pictures with fewer mistakes. The aim is to provide the following.

[Means to solve the problem]

The characteristic structure of the camera of the present invention according to the first means for achieving the above object is as set forth in claim 1, from the focusing position of the photographing lens to the subject located within the focus detection area within the photographing region. In a camera equipped with a focus detection means for detecting a deviation of A depth of focus adjustment means is provided for automatically setting the aperture of the photographing lens, for example, by automatically narrowing down the aperture of the photographing lens so that at least two of the images are formed within the depth of focus.

Further, the feature structure of the camera of the present invention according to the second means for achieving the above object is as follows: In a camera comprising a focus detection means for detecting a deviation from a focus position, and a focus adjustment means for moving the photographing lens toward a focus position based on the detected deviation by the focus detection means, the focus detection means A plurality of focus detection areas are provided to correspond to a plurality of focus detection areas having different set positions, and for example, the imaging The focus adjustment control means is provided to operate the focus adjustment means to move the lens from a focus position for one subject to a corrected focus position biased towards the focus position for another subject.

Furthermore, the characteristic structure of the camera of the present invention according to a third means for achieving the above object is as set forth in claim 5,
a focus detection means for detecting a deviation from a focus position of a photographing lens with respect to a subject located within a focus detection area within a photographing region; and a focus detection means for detecting a deviation from a focus position of a photographing lens with respect to a subject located within a focus detection area within a photographing region; In the camera, a plurality of the focus detection means are provided corresponding to a plurality of focus detection areas having different setting positions, and at least one of the subjects located in the plurality of focus detection areas is provided. The aperture of the photographing lens is automatically set, for example, by automatically narrowing down, so that both images are formed within the depth of focus, and, for example,
Depth of focus control means is provided for operating a focus adjustment means to move the photographing lens from a focus position for one subject to a corrected focus position biased towards a focus position for another subject. It is in.

[For production]

In other words, in the camera of the present invention, the plurality of focus detection means almost simultaneously detect the deviation from the in-focus position of the photographing lens with respect to the plurality of subjects located in the plurality of focus detection areas set within the photographing area. To detect. Then, based on the result, for example, in the cameras of claims 1 and 2, the aperture is automatically set, and preferably, as in the camera of claim 2, the depth of focus is expanded by automatically narrowing down the aperture. In addition, in the cameras according to claims 3 and 4, by automatically moving the photographing lens, preferably, as in the camera according to claim 4, the photographing lens is moved to an intermediate focus position for a plurality of subjects. By moving the lens to the corrected focusing position, the cameras of claims 5 and 6 furthermore have the ability to focus on a plurality of objects at different positions in the far and near directions in cooperation with the above-mentioned automatic aperture setting operation and the movement of the photographic lens. Even if several objects are mixed in the photographing area, images of the plurality of objects can be kept within the depth of focus and photographed in focus. Therefore, in such a shooting situation, the photographer can instantly carry out the actual shooting operation, that is, the exposure operation for the film, without changing the posture of the camera.

Particularly, in the camera according to claim 5, by moving the photographing lens, the photographing lens is positioned in the vicinity of each different focusing position for a plurality of subjects to be positioned within the depth of focus of the photographing lens. Therefore, there is no need to increase the aperture of the photographic lens very much.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

2 to 4 are schematic diagrams of the overall configuration of the camera according to the present invention. This camera consists of a camera body (1), a photographic lens (2) that is detachably attached to the lens mount (IA) of the camera body (1), and a photographic lens (2) that is detachably attached to the hot shoe (IB) of the camera body (1). A freely attached flash device (3) and a camera body (1)
) data pack device (4) built into the back cover (Ic).
).

2 and 4 show a state in which a flash device (3) is not attached, and FIG. 3 shows a state in which a photographic lens (2) is not attached.

(Ii) is the release button for shooting, (
12) to (14) are operation keys for switching the operation mode of the camera.

(l2) is a screen size switching key for switching between ``Full Size Mode'', which shoots at the normal screen size, and ``Panorama Mode'', which shoots at half the screen size by cutting off the top and bottom of the normal screen size. (l3) has two modes: ``Program mode'', which shoots with normal automatic focus adjustment, and ``Program mode'', which shoots with automatic focus adjustment that prioritizes depth of field.
This is a focus mode switching key for switching between the focus mode and the depth mode. (l4) is a focus area switching key for switching the focus detection area for automatic focus adjustment operation.The various operation modes mentioned above will be described later. FIG. 1, which shows the body display section of the display device, is a block diagram of the internal electric circuit of the camera according to the present invention, which includes a photographic lens (2), a flash device (3),
A data pack device (4) is also shown.

(100) is a CPU for controlling the operation of the camera, which controls the operation of the entire camera system including each device in the camera body (1), the flash device (3), the data back device (4), etc. Reference numeral (101) is a film sensitivity reading circuit which reads sensitivity information of the film by bringing a terminal provided in the cartridge chamber into contact with the film cartridge. (20
0) is the lens circuit inside the photographic lens (2), and the CPU
Lens data etc. are exchanged with (100). (10
2) is a display control circuit, which controls the aforementioned body display section (15) and the finder display section (I6) provided in the viewfinder.
Controls the display of shooting information, etc.

(103) is a photometry circuit, which is a multi-division circuit for natural light photometry (1
04), and controls the operation of the dimming circuit (106) to which the light receiving signal from the light receiving element (107) for flash dimming is input. This light control circuit (106) outputs a signal to the flash control circuit (300) in the flash device (3) to stop flash emission when the amount of light received by the light receiving element (107) reaches a predetermined amount. do. <108) is a cyrisk for the X contact, which outputs a trigger signal to start flashing to the flash control circuit (300) in the flash device (3) when the output signal of the CPU (100) changes to "H" level. do.

(DB) is a data control circuit in the data pack device (4), which receives an imprinting start signal (IMF) from the CPU (100).
), the operation is controlled to record the necessary data on the film.

(109) is a light receiving sensor array for focus detection (hereinafter CO
(referred to as D), the light reception signal for detecting the deviation from the in-focus position of the photographing lens (2) with respect to the subject is C P
Output to U(too). (110) is a driver for driving the AF for focus adjustment operation to eliminate the above deviation.
motor (AFM), winding motor (WM) for winding the film, rewind motor (WM) for rewinding the film
RWM), shutter, aperture, and a charge motor (CHM) for charging the mirror mechanism, as well as release start magnet (111), aperture stop magnet (112), and shutter 1st act start magnet. (113), each magnet of the second curtain start magnet (114) of the shutter is driven.

(121) is a photocoupler for shutter detection, which detects passage of the shutter to an intermediate position, which will be described later.

(122) is a photocoupler for lens position detection, which detects the position of the photographic lens (2) during focus adjustment.

(123) is an aperture detection photocoupler that detects the aperture stop state.

The CPU (100) includes various switches (SRC).
A status signal from ~(SON) is input.

(SRC) is a back cover switch, which is opened when the camera back cover (IC) is closed. (SLS) is a loading detection switch, which is opened when the initial winding of the film is successful. (SFL) is a film detection switch, which is in an open state when film is in the aperture portion of the camera. (SWC) is a single frame switch, which is opened when the feeding of one frame of film is completed. (SCH) is a charge detection switch, which is opened when the shirt charge is completed. (SMO) is a screen size changeover switch that is closed in conjunction with the operation of the screen size changeover key (l2).

(S1) is a photometry switch that is closed by pressing down the first stroke of the release button (l1), and when this photometry switch (S1) is closed, photometry operation and focus detection operation are started. Ru.

(S2) is a release switch that is closed when the release button (11) is pressed down with a second stroke that exceeds the first stroke;
), the actual photographing operation begins.

(SNP) is a full size detection switch that is closed when the screen size is [full size], and (SPP) is a panorama size detection switch that is closed when the screen size is [panoramic size].

(SAP) is a focus area changeover switch that is closed in conjunction with the operation of the focus area changeover key (l4);
(SDN) is a focus mode changeover switch that is closed in conjunction with the operation of the focus mode changeover key (13).

Next, the operation of this camera is controlled as shown in FIGS. 5 to 12.
This will be explained using the flowchart shown in the figure.

The flowchart in FIG. 5 is a main routine that controls the overall operation of the camera, and is activated by a change in the state of a switch. In this main routine, we will use the above-mentioned 《Switch (SRC), (SMO), (SAP)
, determine the status of (SDP)〈#5〉~〈#30〉,
An operation is performed according to the determination result.

When the back cover (IC) is opened, <#5> the rewinding completion flag (RWCF) indicating the completion of film rewinding is set to “
0” <#6>, set the film counter value to “O” <#7>, and stop the program execution.
C) is closed, <#lO>, subroutine <<
After calling ``Back cover closing operation''<#11>, execution of the program is stopped. FIG. 6 shows a flowchart of this subroutine.

This subroutine first determines whether there is film or not.
#l00〉, if there is no film, return as is,
If there is film, load detection switch (SLS)
) is released to perform initial winding of the film.<#105>~<#l15
>. After that, set the film counter value to "l"<#12
0>, input the film sensitivity information <#l25>, store the logarithmically converted film sensitivity value (SV) in the film sensitivity register (SVR) <#130>, depending on whether the film is a negative film or not. <#135>, in the case of reversal film, set the negative positive flag (NPF) to “l”.
"<1140>, and in the case of a negative film, the negative/positive flag (NPF) is set to "0"<#145>, and the process returns.

Continuing the explanation of the main routine, when the screen size changeover switch (SMO) is closed, <#15>, after calling the subroutine <<Screen size change>><816>
＞ , stop the program execution. FIG. 7 shows a flowchart of this subroutine.

When entering this subroutine, if the back cover (Ic) is open <#200>, the film is not in the aperture area <#202> and the rewind completion flag (RWCF) is "l".
” (returns to “0” when the camera back is opened) <1204>,
If the film is negative <#206> and the film counter value is not "l"<#208>, the process returns to the main routine, and only in other cases <#208>
Proceed to the flow after step #210> to switch the screen size. In other words, when reversal film is loaded, when Film T is not loaded and the camera back cover (IC) is closed, the screen size can be changed at any time, and negative film is loaded. In this case, the screen size can be switched only when the film counter value is "1".

Now, to explain the screen size of this camera, the screen size of this camera is 35m, as shown in Figure 13.
``Full-size mode'' uses M-version film and shoots with an aspect ratio of 2:3 (this is called a full-size screen (F)) with the entire width of the film as the exposure range. , it is possible to switch between ``panoramic mode'', which shoots in ``panoramic size'' (this is called a panoramic screen (Fp)) with an aspect ratio of 1:3, with the exposure range being the middle part in the width direction of the film. .

When performing DP processing on the film that has already been shot, the vertical dimensions of the [panoramic size] frames are enlarged at twice the printing magnification of the [full size] frames and printed on photographic paper. Similarly, [Panorama Size Co.] allows you to obtain horizontal prints with a panoramic impression compared to [Full Size].

As mentioned above, since the printing magnification during DP processing is different, in the case of negative films that require printing processing, all the screen sizes for one film should be the same and the DP
In order to avoid complicating the P processing, switching of the screen size is allowed only before the start of the photographing operation. On the other hand, in the case of reversal film, the obtained transparency is held one frame at a time on a mount, and for example, it is relatively easy to divide the film into groups at the projection stage and project them at different magnifications. Since DP processing does not become complicated even if frames of both sizes are mixed on one film, the screen size can be switched at any time. Furthermore, when no film is loaded, the screen size can be changed at any time to check the camera's mechanism and operation.

Next, the configuration for switching the screen size described above will be explained. As shown in FIGS. 14(A) to 14(C), (20), a pair of upper and lower light shielding members (21A) and (21B) that can be slid freely along the direction perpendicular to the longitudinal direction of the film (for convenience, this direction is referred to as the vertical direction of the screen),
The first curtain (22P) and the second curtain (22P) that make up the shutter
2S) and is integrated into the position closest to the film (F).

These pair of light shielding members (21A), (21B) normally close the shutter opening (20a) by the urging force of separate springs (23A), (23B), as shown in FIG. 15(A). The camera is held in a position that fully exposes the screen, and in this state, it is possible to take pictures on the [full size] screen. Both of the light shielding members (21A) and (21B) are respectively formed with protrusions (21a) and (2lb) in a posture that protrudes to the side of the shutter unit (20).
As shown in FIGS. 16 and 17, a pair of operation members (24A) are engaged with the respective projections (21a) and (2lb) to slide the light shielding members (21A) and (21B). ). (24B) is operatively connected to a rewind motor (RWM) for rewinding the film via a cam plate (25) and a gear interlocking mechanism (26).

Figure 17 shows the state for [full size] display,
In this state, the full size detection switch (SNP) is closed and the panoramic size detection switch (SPP) is open.

As shown in FIG. 16, a transmission switching member (26a) consisting of a pair of planetary gears is interposed in the gear interlocking mechanism (26), and when the rewinding motor (RWM) rotates forward, this transmission switching member Film rewinding in which the member (26a) itself rotates in the normal direction and engages with the rewinding fork (22) that engages with the film cartridge; and engages with the rewinding transmission mechanism (28) to transmit driving force to the rewinding fork (27). state and when the rewind motor (RWM) is in reverse rotation, the transmission switching member (
26a) itself is also reversed and removed from the rewinding transmission mechanism (28), and is configured to switch to a screen size switching state in which it engages with the gear interlocking mechanism (26) and transmits driving force to the cam plate (25). It has been done.

Then, in the screen size switching state described above, the 15th
From the full-size co-film screen shown in Figure (A),
In Fig. 7, the cam surface (25a) of the cam plate (25) is aligned with the pin (24a) by rotating the cam plate (25) half a turn clockwise by reversing the rewind motor (RWlii).
), (24b) to release the pair of operating members (24A
) and (24B) are vertically separated. Along with this, these operating members (24
A), (24B) are light shielding members (21A), (21B
), the pair of light shielding members (21A), (21B) are pulled together against the urging force of the respective springs (23A), (23B). Slide in the direction of proximity. As a result, the 15th
As shown in Figure (I), the shutter opening (20a)
Only the middle part between the top and bottom of is exposed, and [Panorama size]
Enables shooting on the screen. In this state, the full size detection switch (SNP) is open and the panorama detection switch (SPP) is closed.

From this state, the rewind motor (RWM)
) by further rotating the cam plate (25) half a turn clockwise, the cam surface (25) of the cam plate (25)
The pressing state of the pair of operating members (24A), (248) against the pins (24a), (24b) due to a) is released. Along with this, a pair of operating members (24A),
(24B) is a separate spring (29A), (29B
) returns to its original position due to the biasing force of the pair of light shielding members (
21A), (21B) also have different springs (23A)
, (23B) returns to the original position, and the first
Return to the [full size] display state shown in Figure 5 (a).

Here, to explain the operation of the shutter, as shown in Fig. 18 (a) and (0), this shutter is configured as a vertically running four-force plane shutter, and as shown in Fig. 14. As shown in (a) to (c), the first curtain (22P) and the second curtain (22S) are incorporated into the shutter unit (20) in this order from the front side along the optical axis (L).

In preparation for shooting, the first curtain (22P) of the shutter is moved by the operation of the charge motor (CHM), as shown in Figure 18 (a).
As shown in , the two wings (2
2Pa), (22Pb) to open the shutter (20
a) Close. In this state, the first curtain (22P) is held in position by a locking member (not shown).

When the release operation is started from this state, the locking by the locking member is released by the operation of the first curtain start magnet (114), and the two blades (22P) of the first curtain (22P) are released.
Pa), (22Pb) move upward, and as shown in Fig. 18 ([
+), the shutter opening (20a) is exposed. After that, after timing the predetermined shutter speed, the second act start magnet (115) is activated to start the second act (22S).
The two blades (223a) and (22Sb) move upward to close the shutter opening (20a).

Now, when using such a four-force plane shutter to take pictures with a flash, the flash should be fired with the shutter aperture (20a) fully open relative to the shooting screen so as not to cast shadows on the subject. There is a need,
For this purpose, the open state of the shutter is detected.

As mentioned above, this camera allows you to take pictures in [Panorama Size], where the shooting screen is narrow vertically, and when shooting with flash in this [Panorama Size], you need to use the shutter described above. Even if the entire opening (20a) is not exposed, the pair of light shielding members (
21A) and (21B), the flash may be emitted in a state where the portion of the shutter opening (20a) that is vertically restricted is exposed. Therefore, Fig. 18 (a)
, (0) and FIG. 19, the blade (22
Pb), the lower end edge of the pair of light shielding members (21A),
At the timing when the light reaches the lower edge of the upper light shielding member (21A) of (21B), the light passes through the hole (30a) formed in the swing arm (30) of the rear blade (22Pb). A photocoupler (121) for detecting the intermediate position of the shutter is provided at the transmitting position.
21), the X contact is closed and the flash is emitted at the light reception timing.

In addition, when shooting with flash in [Full size], time measurement is started from the timing when the intermediate position of the shutter is detected by the above-mentioned photocoupler (121), and the lower edge of the rear blade (22Pb) is set to [Panorama]. Size] After passing the lower edge of the upper light shielding member (21A) in the revealing state and reaching the upper edge of the shutter opening (20a), close the X contact. hand,
It is configured to emit a flash.

As mentioned above, compared to the [Full Size] screen, the [Panorama Size] screen has both shutter curtains (22P),
(22S) has a small dimension along the traveling direction, and when shooting in [Panorama size], the lower edge of the rear blade (22Pb) of the first curtain (22P) of the shutter is smaller than that of [Panorama size]. When the camera passes the top edge of the screen, the X contact is closed and a synchronization signal for flash firing is output. Taking advantage of the fact that the shutter speed is shorter than that when shooting at full size, the flash synchronization speed at panoramic size can be increased.

Returning to FIG. 7 and continuing the explanation of the subroutine <<screen size switching>>, from step <1210> onwards, the above-mentioned screen size switching is performed. First, in step <#210>, the current screen size mode is determined.

In the case of <Full size mode>, the rewind motor (
RWM) and change the screen size to [Panorama size]
Switch to <#220> to <#224>, [Depth mode], which allows you to shoot under shooting conditions that give priority to depth of field, as many subjects will be positioned on the screen in panorama size photography. <#226>, display it on the body display section (l5) <#228>, then switch the screen size mode to "panorama mode"<#230>, and display it in the same way <#232>, Next, input the signal from the data control circuit (DB).
#234>.

If you have a data pack device (4), since the shooting screen in [Panorama size] is cut off at the top and bottom compared to the standard screen of the film, it is necessary to imprint the shooting date etc. on the film. However, the imprinted information will not be recorded on the horizontally long print obtained by the DP processing for [panorama size] described above, so you can use the display section (4a) of the data pack device (4) to indicate this fact. In order to notify the photographer, a print imprinting disabled signal (IM
After transmitting PNOT) to the data control circuit (DB)
236>, <#238>, and if there is no data pack device (4), both return to the main routine. Incidentally, on the display section (4a) of the data back device (4) in FIG. 4, an "x" mark is a display indicating that printing cannot be imprinted.

On the other hand, if the current screen size mode is <<Panorama mode>> as determined by <#210>, the rewind motor (RWM
) and change the screen size to [Full Size] to <#240> to <#244>, and in [Full Size] switch to <<Program Mode>> for shooting under normal shooting conditions <#246>, then set it to the body Display on the display section (15) <#248>, then switch the screen size mode to <<full size mode>><1250>, perform the same display <#252>, and send the print imprinting enable signal (IMPOK). After output <#254>, return to the main routine.

Here, the body display section (l5
). Fig. 2 shows all the symbols that are displayed, although they are not actually displayed at the same time. The numbers displayed in segments indicate the film counter value.

The character display rPANORAMAJ indicates that it is in <<Panorama mode>> (panorama mode display), and is not displayed in <<Full size mode>>. The characters "rFULL" indicate the <<full size mode>> (full size mode display) and are not displayed in the <<panorama mode>>.

The character display "rDEPTH" indicates that the mode is <<depth mode>> (depth mode display), and is not displayed in <<program mode>> (program mode display).

Returning to FIG. 5 and continuing the explanation of the main routine, if the focus area selection switch (SAP) is closed instead of the screen size selection switch (SMO), <#20>, <# The process proceeds to the flow following step 22> to perform an operation of switching the focus area to be the focus detection target.

That is, it determines the currently selected focus area mode <#22> to <#26>, and if it is "Whole", it switches to "Center"<#22>,<#23>, and if it is "Center" Switch to "left side"<#24>,<#2
5>, If it is “left side”, switch to “right side” <#26>
, <#27> If it is none of the above, that is, if it is "right side", then after switching to "whole"<#26>
, <#28>, switches the display of the selected focus area <#29>, and then stops execution of the program.

Here, the four types of focus areas mentioned above and their display forms in the finder will be explained. FIG. 20 shows the entire photographing range. The outermost frame (FF) is [
It is a full-size shooting screen (full-size screen), and it is divided into three parts by two lines into the middle frame (F,
) is the shooting screen for [Panorama size] (panorama screen)
It is. Then, inside this panoramic screen (Fp), there are three frames (PL), (FC), (F
R) is the focus area mentioned above.

When the focus area mode is "Whole", all focus areas (Fi.) - (Fc), (P
Automatic focus adjustment operation is performed using the focus detection information from R). Also, the focus area mode is ``center'', ``
In the case of either the left side or the right side, the corresponding focus areas (Fc), (PL), (Fi1
) performs automatic focus adjustment operation using focus detection information from

Also, to accompany this explanation of the shooting range, I would like to explain:
The photometry area for obtaining the brightness information of the subject is also structured so that the entire shooting range is divided into six. Three of those six photometric areas (left area (BL), center area (B,), right area (BR)) are respectively the three focus areas (PL), (FC), (P
The remaining three are set to a slightly wider range that includes each of the photometry areas (BL) and (Bc
). An intermediate area (Bsc) set to a range corresponding to the panoramic screen (F,〉) other than (OR), and a full size area above and below this intermediate area (Bsc) (i.e., the full size outside the panoramic screen (t”p) These are the upper area (BSU) and lower area (Bso) set on the screen (FF), and the six photometry areas (BL) (BC),
(BR). (Bsc), (BSU). (BSD)
The six light-receiving elements (105) already described correspond to the respective light-receiving elements (105).

Now, regarding the display in the finder, Figure 21 (A) - (
To explain using point C), FIG. 21(a) shows all the marks that are displayed, although they are not actually displayed at the same time. The two horizontal lines are displayed to indicate the upper and lower boundaries of the panoramic screen (FP) in <<Panorama mode>>. Also, the three frames in the center are
This is a display to show the focus area, and when any of the three focus areas is selected, for example, if it is "left side" in "panorama mode", the display shown in Fig. 21 (
If only one frame is displayed as shown in Figure 21 (C) and the focus area mode is ``Whole'', for example in ``Full size mode'', the entire frame is displayed in a large size as shown in Figure 21 (C). It is displayed as one frame.

The lightning bolt mark on the right side of the viewfinder field of view is a flash indicator that lights up when the flash capacitor is fully charged, and the circle mark below it lights up in green when the shooting optical system is in focus on the subject. This is the focus display.

Returning to Figure 5 and continuing the explanation of the main routine, if the focus mode selector switch (SDP) is closed instead of the focus area selector switch (SAP), the currently selected focus Determine the mode <#35>, if it is "depth mode", switch to "program mode"<#36>, if it is "program mode", switch to "depth mode"<#37>
, After switching the focus mode display<#39>,
Stop program execution.

As already explained, the focus mode is displayed on the body display section (l5) shown in FIG.
In <<program mode>>, this is done by erasing the character display.

Now, if the focus mode selector switch (SDP) is not closed, then the subroutine <<calculation/control>> is called <#40>, and then execution of the program is stopped. Flowcharts of this subroutine are shown in FIGS. 8 to 10.

In this subroutine, first, the photometry circuit (103) starts photometry, and the focus detection circuit (109) starts accumulating the CCD for focus detection <#300>
, Once the accumulation is completed <#302>, input lens data such as focal length information from the lens internal circuit (200) <#304>, and after inputting COD accumulated data from the focus detection circuit (109). <#306> , defocus amount (DFL,,o), (DFo,a), (DF
R,. , ) to find <#308> to <#312>.

Furthermore, due to the relationship with the "depth mode" described later, in the initial state where no focusing operation has been performed, this camera focuses the movable lens in the photographic lens (2) at infinity (this is when the camera is photographed). (referred to as the initial position of the lens (2)), and the defocus amount (DF
L, o), (DFc=o), (DFR, 5) are also
It is determined as being equivalent to the amount of movement of the movable lens from its initial position (the subscript "■" indicates the amount of defocus from infinity).

Now, each focus area (F.), (FC),
After calculating the defocus amount for each (Fl1), determine the focus area mode <#314> to <#318>
, and according to the determination result, if the focus area mode is "Whole", the three defocus amounts (DF
Set the maximum of L-), (DFc-), and (DFR-), that is, the defocus amount of the subject closest to the camera, as the defocus amount to be used (DF-)<#320>, and then focus. When the area mode is other than "Whole", the defocus amount for the corresponding focus area is calculated as the used defocus amount (DF-=) according to the selected focus area mode.
Set as <#322> to <#326>.

After setting the defocus amount (DF-=) to be used, convert it to the pulse value (LD-) for actually driving the lens.<#3
30>, drives the movable lens of the photographing lens (2) based on the pulse value (LD-) <#322>, and after completion of this, lights up the focus display in the viewfinder <1334>
. Next, after inputting photometry data from the photometry circuit (103) <#336> and inputting flash data from the flash control circuit (300) in the flash device (3) <#338>, the subroutine "exposure calculation" is executed. Call and calculate exposure value etc.<#340>. This subroutine will be explained later.

After returning from the subroutine ``exposure calculation'', the release switch (S2) and photometry switch (Sl) are checked <#345>, <#350>, and if the release switch (S,) is closed, <# 345>, proceeds to the <<Release>> routine, while the photometry switch (S1
) is closed, <#345> and <#350>
Repeat the steps and switch (S+). (SZ)
Wait for the state to change, and if the metering switch (S+) is also open <1350>, turn off the flash display and focus display <#352>, and return the movable lens of the photographing lens (2) to its initial position <# 354>, after stopping the photometry operation<
#356>, return to the main routine.

The flowchart in FIG. 9 is the above-mentioned <<Release>> routine.

In this routine, first, since the viewfinder image is no longer visible during release, the flash display and focus display are also turned off <#360>, and then only when the data back device (4) is present <#362>, the film is Sensitivity value (Sv)
and a data imprinting start signal (IMP”) to the data control circuit (DB) <#364>, <#36
6>.

After that, activate the release magnet (111) to start the release operation <#370>, set the time (TA) required for mirror up in the timer and start it <#372>, <#374>, and aperture detection. Aperture counter (A) linked to photocoupler (123) for
PC) is checked <#376>, and when the aperture reaches the predetermined amount, the aperture stop magnet (112) is activated to fix the aperture <1378>, and the above-mentioned timer times out, that is, the mirror is not raised. Wait for completion <1380>.

When the mirror up is completed, check whether it is in ``flash mode'' using the flash device (3).
#382>, only in the case of <<flash mode>>, after allowing the synchronization interrupt <<XPC interrupt>> for causing the flash device (3) to emit synchronized light <#384>, the first curtain of the shutter (22P) Start <#386>,
Start the shutter timer (SS) for measuring shutter speed <#388>,
), the second curtain (22S) of the shutter is started <#392>.

After that, set the time (Ts) required for the second act (22S) to run on the timer and start it<#394>
, <#396> After waiting for the timer to time up <#398>, the process proceeds to the subsequent <<winding>> routine.

Interrupt for synchronization in case of ``flash mode'' 《XPC
Interruption> occurs from <#388> to <#390> during the above-mentioned shutter timer CSS) (7) waiting for time-up. The synchronization interrupt (XPC interrupt) is the light reception timing of the photocoupler (121) for detecting the intermediate position of the shutter described above, that is, the first curtain (22P) of the shutter.
This occurs at the timing when the lower edge reaches the position corresponding to the upper edge of the panoramic screen (F,).

When a synchronization interrupt (XPC interrupt) occurs, it is determined whether it is in <Panorama mode> or not <1400>. If it is in <Panorama mode>, the shutter is fully open at [Panorama size], so flash control is performed. After the bird outputs a signal to the circuit (300) <#402>, the process returns.On the other hand, in the case of <<full size mode>>, the first curtain of the shutter (
The time (T,) required for the lower edge of 20A) to travel from the position corresponding to the upper edge of the panoramic screen (F,) to the position corresponding to the upper edge of the full-size screen (F,) is set to a timer. Set and start<#410>,<#
412>.

Here, the timing of shutter movement and synchronization of the flash device (3) will be explained. Figure 22 shows the panoramic screen (
A panoramic size aperture (A,) corresponding to the full-size screen (F,) and a full-size aperture (A,) corresponding to the full-size screen (F,).
, ), the running form of the first curtain (22P) and second curtain (22S) of the shutter is shown with the time axis plotted on the horizontal axis. The line (I) in the figure shows the run of the first act (22P), and the lines (IIP) and (IIF) in the figure indicate the run of the second act (22S) in "Panorama mode" and "Full size mode", respectively. Shows running. Furthermore, in each line, the "○" mark indicates the start of running, and the "●" mark indicates the stop of running.

In the case of "Panorama mode", as mentioned above, the first
The trigger is activated at the timing (1+) when the curtain (20A) passes the panoramic size aperture (A,). In the case of "Full-size mode", the aperture is larger and the synchronizable shutter speed is slower than in the case of "Panorama mode", so in the above-mentioned synchronization interrupt (XPC interrupt), the first act (22P) The trigger signal is output when the camera passes the full-size aperture (AF) ([2), but since slow synchronization is also possible, this timing is determined after a predetermined shutter speed (SSF) has elapsed as shown in the figure. This may occur after the second act (22S) starts running.

So, returning to the explanation of the synchronization interrupt (XPC interrupt), in the case of <Full size mode>, as mentioned above, the timer is activated at the timing when the first curtain (22P) of the shutter passes the intermediate point. After starting <#412>, the bird outputs a signal and waits for a predetermined shutter speed to elapse in the interrupt routine, and after waiting until both are completed, <#394> It is designed to move to the flow below the steps below.

That is, when the shutter timer <SS> times up, after the second act (22S) starts running <#414>,
<#416>, if the output of the trigger signal is completed, the second
Move to curtain (22S) running count <#418>,
<#394>, If not completed, wait until the timer times out <#418>, <#422>,
The bird outputs a signal <#424>. After that, if the shutter timer (SS) has timed up, the second act (22
3) Move to mileage count <#426>, <#3
94>. If the shutter timer (SS) has not timed up in <#414>, proceed to step <#420>; if the bird has output the signal, return to step <#414> and set the shutter timer (SS) If the bird has not yet output the signal, the process advances to step <#422> and waits for the timer to time up. <#422
If the timer has not yet timed out in step >, <#
If the shutter timer (SS) has timed up, the process returns to step <#422> and waits for the timer to time up. In step <#426> and step <#428>, the shutter timer (S
If S) is not timed up, <#414>
Return to step 2 and wait for the shutter timer (SS) to time up.

Now, once the running of the second act (22S) is completed, <#398
> As already mentioned, the process then proceeds to the ``winding'' routine. The flowchart in Figure 10 is for this 《winding》
This is the routine.

In this routine, first, the charge motor (CHM) is started and the shutter, aperture, and mirror mechanisms are charged until the charge motor (CHM) is released. 434〉. Here, if there is no film, the process returns to the main routine without winding the film because it has been blankly shot.

If there is film, then start driving the winding motor (WM) <#438>, set the time required to feed one frame of film in the timer, and start it <#440>.
．． <#442>, After waiting for the single-frame switch (SWC) to be released, <#444>, the hoisting motor (WM
) is stopped <#448>, and the film counter value is incremented <#450>. Then, wait for the photometry switch (St) to be released, <#452>,
Return the movable lens of the photographic lens (2) to the initial position <#4
54>, after stopping the photometry operation <#456>, the process returns to the main routine.

Checking whether or not the timer times up while waiting for l-frame film to be wound <#446
>. When the timer times out, it is determined that the end of the film has been reached and the film is stretched, and <#460>
Proceed to the ``Rewind'' routine following step .

In this routine, first, the drive of the winding motor (WM) is stopped <#460>, and the film counter value is turned on to notify that the film has finished. Let me<#462
＞, stop the metering operation ＜#464＞, and close the photographic lens (2).
> returns the movable lens to the initial position <8466>. Then, wait until the photometry switch (S,) is released and <#4
68>, the rewind motor (RWM) is driven in normal rotation to start rewinding the film <#470>, and waits for the film detection switch (SFL) to be closed <#472>. Next, the timer detects that the leading edge of the film is connected to the film detection switch (
Set the time (T■) required for the film to be wound into the film cartridge from the SFL) position and start.
#474>, <#476>, wait for the timer to time up <#478>, and stop driving the rewind motor (RWM).

Here, the screen size is determined <#482>, and only in the case of [Panorama size], the full size detection switch (SNP
) is closed, drive the rewind motor (RWM) in reverse and switch the screen size to [Full size] <#484
>~<#488>.

After that, set the focus mode to "Program mode"<#490>, display it on the body display section (l5) <#492>, set the screen size mode to "Full size mode"<1494>, and do the same. Display <#496> and set the rewind completion flag (RWCF) to “l”
After <#498>, return to the main routine.

The flowcharts in FIGS. 11 and 12 are the subroutine "exposure calculation" called at step <#340> of the subroutine "calculation/control" described above.

In this subroutine, we first turn off the flash display.
#500>, determine the focus mode <#502>
, Determine whether it is in <<Flash mode>><#504>
. 《Program mode》 and 《Flash mode》
In the case of , proceed to the ``normal operation'' routine. This routine will be described later. Otherwise, <#5
The process proceeds to the <<depth mode calculation>> routine following step 06>.

In this <depth mode calculation> routine, the three focus areas (PL), (FC), (
PR) In order to be able to take a picture of a subject located within the range of focus as much as possible, the aperture should be narrowed down to a range that does not cause camera shake to obtain a large depth of field, and the subject should be The main subject (subject within the selected focus area or
In the case of "Overall", the movable lens of the photographing lens (2) is moved from the in-focus position for the closest object).

To explain this further, the reason why the above-mentioned depth of field exists is as follows. In other words, if each part of the object is considered to be composed of a collection of points, an image is recorded by focusing each point on the film surface through a photographic lens. In this case, if the point on the object side is completely imaged as a point on the image side, it will be an ideal image, but in reality, due to lens aberrations, defocus, etc., it will not become a point and will be blurred to some extent. It becomes an image. However, the human eye is unable to distinguish between them, and if the blur of a point is below a certain range, it will be recognized as a point. The limit of the human eye's ability can be defined by the diameter of a blurred point image, which is called the permissible diameter of the circle of confusion ``δ.'' Therefore, as long as the size of the blur in front and behind the image plane is within the allowable circle of confusion diameter "δ" with respect to the focal point on the image plane, the shift in focus will not be a concern.

This range is the depth of focus, and the range of objects that are brought into focus within this depth of focus is the depth of field. , (the same applies hereinafter)) A photograph will be obtained.

Now, if we define the allowable circle of confusion diameter "δ" as mentioned above, (
For example, [33. 3 μm]), thereby determining the depth of focus. When the optical path is drawn as shown in Fig. 23, the allowable blur range [PDF] to one side from the focus position (PF) is f/D=PDF/δ (i), and the F of the photographing lens (2) is Since the number (F) is defined as [F=f/D], from the above formula, PDF=F・δ
(ii), and the depth of focus (FD) is twice this allowable range [PDF], so FD=2·F·δ (iii).

Based on the above idea, we now consider depth of field. In order to take a photograph of multiple subjects located in a certain range of distance and distance, it is necessary to It is sufficient that the image is formed within the depth of focus,
To do this, if we look at formula (ii) or formula (ii) above, we can see that the allowable circle of confusion diameter "δJ" is a value specific to the photographic lens (2), so the F number of the photographic lens (2) is It turns out that it is necessary to change (F).

For example, first, consider a situation where the image of a certain main subject is focused on the film plane (the position marked by ■), as shown in FIG. 24(A). At this time, an image of a sub-subject located further away from the main subject (for example, a subject located at infinity) is focused at the position (■). Therefore, the image of one point of the sub-subject on the film surface has a diameter of [δ1], which is larger than the permissible circle of confusion diameter [δ], so if exposure is performed in this state, the sub-subject will be out of focus. will not match.

In this state, F, = f/D, = DFd/δ, (iv)
However, the following relationship holds: Fl: F number of the photographic lens (2) f: focal length D1: effective aperture DFd of the photographic lens (2): defocus amount of the sub-subject relative to the main subject.

From this state, by changing the aperture of the photographing lens (2) while leaving the photographic lens (2) in the position ■, the image of a single point of the sub-subject on the film surface (■) can be adjusted to the permissible circle of confusion diameter. [δ], that is, in order for the sub-subject to be at the edge of the depth of field, the F number (F) of the photographic lens (2) is determined by the maximum depth priority F number (
Fdepm). That is, F depm= f / D 2 = DFd/δ -
(v).

In theory, if you expose in this state, you can obtain a photograph in which the sub-subject is also in focus, but in reality, the subject is usually three-dimensional rather than two-dimensional, so the light Since it has unevenness in the direction along the axis, if the sub-subject is at the edge of the depth of field, it is not necessarily possible to obtain a photograph in which the sub-subject is in focus. Therefore, it is preferable to perform exposure with as much depth as possible.

On the other hand, the photographic lens (2) has a limit to which it can narrow down.
In addition, under shooting conditions where the brightness of the subject is low, increasing the aperture amount will increase the shutter speed and increase the probability of camera shake. Sometimes it is difficult to take pictures in such a situation.

Therefore, in order to deal with such cases, when the photographic lens (2) is in the position ■, the image of the main subject is focused on the film plane (■), and the depth of field is on both sides. Since there is a margin for Maximum depth priority F number (Fdep
m) (i.e., a larger aperture), thereby reducing restrictions on aperture due to the aperture limit and brightness of the photographic lens (2), and also making it possible to make the main subject and sub-subject Both are designed so that you can get photos that are in focus.

To explain this using Figure 24 (a), first,
As depth-priority pick-up (Fdep), the shooting lens (2
) is at position ■, the image of one point of the sub-object on the film plane (■) is slightly larger than the allowable circle of confusion diameter [δ], but the size of the image of one point of the sub-object in equation (iv) is Find the size that is smaller than [δ1k] [61′k (61′=α・δ; α≧1). That is, F dep = f / D = DFd/δ1° = DF
d/α・δ−(vi) However, α is a constant of 1 or more, and this is when the effective aperture of the photographing lens (2) at the position of ■ is set to [D], and this effective aperture is A photographic lens that provides maximum depth priority F number (Fdepm) (
2> is larger than the effective aperture [D2], and as a result, the amount of narrowing down for such depth priority processing is small.

Next, while the effective aperture of the photographic lens (2) remains [D],
The size at which the image of one point of the sub-object on the film surface (■) is smaller than the permissible circle of confusion diameter [δko] [δ2ko (δz=
The photographing lens (2) is moved to the position (■) where k·δ; 0.5≦k<l). In this state, Fdep = f /D = (DFd-DFc) /δ
- (vi) However, the following relationship holds: DFc: amount of movement of the photographing lens (hereinafter referred to as corrected defocus amount).

Therefore, from this equation (vi) and the above equation (vi), DFc= DFd-δ2・Fdep =α・δ●Fdep-k・δ・Fdep=(α−k)・
Since δ●F dep, if [β=α−k], DFc=β・δ
・F dep (vi).

In other words, if the three constants [δ], [α], and [β] are determined in advance, when performing the depth-priority processing by cooperation of the above-mentioned aperture operation and the movement of the photographic lens (2), the focal point Using the defocus amount (DFd) between the main subject and the sub-subject obtained in the detection operation, the depth-priority F-number (Fdep) is obtained by equation (vi) and aperture control is performed, and then the depth-priority F-number ( Fdep) is used to calculate the corrected defocus amount (DF
It can be seen that the lens position can be controlled by determining c).

This makes the main subject stand out. This means that it is possible to photograph a subject in a wide range in the far and near directions without causing any distortion and with a small amount of aperture.

Note that (vi >, (vi). From each equation (vi), DFc/DFd=β・δ・Fdep/α・δ・Fde
p=β/α=1−k/α■(ix) For example, assuming that the corrected focusing position is approximately midway between the image of the main subject and the image of the sub-subject, DFc/ DFd = If we set [α=1, β=0.5] so that it becomes 1/2,
As shown in Figure 24 (b), the image of the sub-subject is focused at the position of ■ in front of the film surface (■), and the size of the image of one point of the sub-subject on the film surface (■) is Saha [δ/
2], and on the other hand, the image of the main subject is on the film surface (■)
Focus on the position of ■ behind the film surface (■)
The size of the image of one point of the main subject above is slightly smaller than [δ/2], and it is positioned within the depth of field with sufficient margin for both subjects. You can take pictures with.

Also, depending on the shooting situation, even if the shooting lens (2) is moved, the brightness of the subject may be low, or the amount of defocus between the main subject and sub-subject may be too large, causing camera shake due to aperture. In some cases, it may be difficult to take a photo with both subjects in focus because the aperture may need to be stopped down further than the minimum aperture. In this case, the aperture that does not cause camera shake or
The aperture is stopped down to the minimum aperture, and a photographing lens (2) is moved by an amount corresponding to the aperture so that the image of the sub-subject comes as close to the depth of focus as possible while preventing the image of the main subject from going out of the depth of focus.

To explain this using FIG. 24 (C), if the effective aperture of the photographing lens (2) is [D ], and the taking lens (2) is at the position ■, in this state the main subject image is focused on the film plane (■), and the sub-subject image is focused on the film plane (■).
The focus is on the position marked ■ in the foreground. From this state, the above-mentioned F pick-up (FLIM) is replaced with the depth priority F number (Fdep) in the (vu+) formula to obtain the corrected defocus amount (DFc). That is, DFc=β・
δ”FLIM = β・δ・f/D.

This corrected defocus amount (DFc) corresponds to the shooting lens (2
) is moved from the position ■ to the position ■, the image of the main subject will focus at the position ■ behind the film surface (■), and the image of the main subject at a point on the film surface (■) will be focused. The size is smaller than [β・δ], so the main subject is in focus with plenty of room, while the image of the sub-subject is at position ■ in front of the film surface (■). After focusing, the size of the image of a single point of the sub-subject on the film plane (■) is larger than the allowable diameter of the circle of confusion [δ], but it is the size when the photographic lens (2) is at the position of ■. It is smaller than [δl], and it can be said that the state is getting closer to being in focus.

In this <<depth calculation mode>>, first, assuming a sub-subject at infinity, the depth-priority aperture value (Avd) corresponding to the depth-priority F number (Fdep) for the main subject is assumed.
+) (Hereinafter, the processing for keeping the two subjects within the depth of field will be referred to as depth-priority processing, and the calculation of the depth-priority aperture value (Avd) for this purpose will be referred to as depth calculation), and then If depth-priority processing is possible between subjects located in other focus areas, depth calculation is performed in preparation, and adjustments are made taking into account the maximum aperture value and camera shake limit shutter speed. , Then, based on the corrected defocus amount obtained, the photographing lens (2
). And, as mentioned above,
In order to speed up calculations when a sub-subject is assumed to be at infinity, this camera calculates the amount of defocus from infinity.

Now, let's return to the explanation of the subroutine "exposure calculation" and continue with the explanation of the "depth mode" routine. Note that the aperture value, brightness value, etc. in the explanation are all based on the APEX system of logarithmic display.

In this routine, first, the defocus amount (DF...) previously determined for the main subject is used to obtain the (
Determine the depth priority F number (Fdep) using formula vi), and calculate the corresponding lth depth priority aperture value (Avd,
) to find <1506>.

Next, the lth depth priority aperture value (Avd + ) is compared with the open aperture value (Avo ) and the maximum aperture value (Avm), and the lth depth priority aperture value (Avd t ) is smaller than the open aperture value (Avo), the open aperture value (Avo) is set to the 1st depth priority aperture value (Avd I) <#512>, and in this case, the 1st depth priority aperture value (Avd r ) is between the open aperture value (Avo) and the maximum aperture value (Avm), which indicates that depth calculation is possible.
Set the lth depth calculation flag (DPF1) to “0” <#5
14>, when the lth depth priority aperture value (Avd+) is larger than the open aperture value (Avo), the maximum aperture value (A
vm) to the first depth priority aperture value (Avd+) <#516> At the same time, the first depth calculation flag (DPFt) is set to "l”<#5
10>.

Thereafter, the subroutine <<luminance calculation l>> is called, and partial weighted averaging is performed according to the selected focus area to obtain the l-th luminance value (Bv+)<#520>.

These calculation formulas are summarized in Tables 1 and 2 on the next page. "Selection area" in the table indicates the selected focus area,
The "nearby area" indicates a focus area in which a subject exists that has approximately the same amount of defocus as the subject located in the selected focus area. Note that when the "selected area" is either the left or right focus area, the "nearby area" is selected only if there is a subject in at least the central focus area that has approximately the same amount of defocus as the subject located in that focus area. ”.

Also, since it would be complicated, I will only list the focus area on the left side. The same calculation formula can be used when other areas are selected as well.

Table 1 shows the case of <<Panorama mode>>, Table 2 shows the case of <<Full size mode>>, and in either case,
The calculation formula weights the subject brightness information obtained from the "selected area" and the "nearby area". Note that "S" in the table indicates the area of each region.

Next, find a defocus amount (DF) that is smaller than the used defocus amount (DF, o) (the subject is located further away) from among the remaining defocus amounts found earlier.
1522>.

If there is no such small defocus amount (DF), <#5
24>, since depth priority processing cannot be performed with subjects in the remaining focus areas, the second depth calculation flag (DPFz) and the third depth calculation flag (DPFz)
F3) are both "l"<#542>, then <
Proceed to step #550>.

On the other hand, if there is at least one such small defocus amount (DF), the smaller one is the first defocus i (DPI) and the larger one is the second defocus amount (D
F2) and <1526> and depending on the value <#528
>~<#532> The above-mentioned second and third depth calculation flags (DPF2) and (DPF3) are set.

In other words, if both defocus amounts (DF+) and (DFt) are approximately equal to "O", both subjects are located at approximately infinity, and the main subject is already assumed to be at infinity. Debs calculation for the subject is <150
Since it was performed in step 6>, there is no need to perform depth priority processing again, and both the second and third depth calculation flags (DPF2) and (DPF3) are set to "
<#542>, and then proceeds to step <1550>.

Furthermore, among both defocus amounts (DF.) and (DF2), if the first defocus amount (DF.') is not "0" and is approximately equal to the second defocus j[(DF2), The depth calculation only needs to be performed l times, so after setting the second depth calculation flag (DPF2) to "0" and the third depth calculation flag (DPF3) to "1"<#538>, on the other hand, the second defocus amount ( If DF2) is not “0”,
After setting the second depth calculation flag (DPF2) to “1” and the third depth calculation flag (DPF3) to “0” <#540
>, in both cases proceed to step <1550>.

That is, in the two cases described above, it is possible to perform depth priority processing on a subject located in either one of the focus areas.

Regarding both defocus amounts (DPI) and (DF2), [DF2>DF. ], so the first defocus amount CI)Fl) is “
Not 0” but both defocus amount (DPI), (DF2
), if the second defocus amount (OF!) is not equal to “
In order to perform depth calculation separately, both depth calculation flags (DPF2) and (DPF:l) are set to ``0''<#536>, and then <#550
> Proceed to step >.

In the routine from step <#550> to step <#564>, a <<second depth calculation>> is performed using the first defocus amount (DPI), and from step <#570> to step <#584>. In the routine, the second
《Third depth calculation》 using defocus amount (DF2)
Do this. Then, in step <#550>, the second depth calculation flag (DPF2) mentioned above is checked, and in step <#570>, the third calculation flag (DPF2) is checked.
Check F3) and skip if those depth calculations are impossible or unnecessary.

In the <<second depth calculation>> routine, the first defocus amount (DF.) is subtracted from the used defocus amount (DF) to obtain the first defocus difference (DFd,) for depth calculation<#552> , then the first defocus difference (
DFd+) using the above equation (vi), the second
Find the depth priority aperture value (Avd2) <#554>.

Next, the second depth priority aperture value (Avdz) is compared with the open aperture value (Avo) and the maximum aperture value (Avm), and the second depth priority aperture value (Avdz) is determined as <#556>, <#55B>. If it is smaller than the open aperture value (Avo), the open aperture value (Avo) is set to the second depth priority aperture value (Avd2) <#562>, and in this case, the second depth priority aperture value (Avd2) is the open aperture value. (Avo
) and the maximum aperture value (Avm), call the subroutine "Brightness calculation 2" and calculate the second brightness value (
BV2) <#564> On the other hand, if the second depth priority aperture value (Avd!) is larger than the maximum aperture value (Avm), it is no longer possible to narrow down the aperture value, so the second depth priority aperture value (Avd!) is determined.
After setting the depth calculation flag (DPF2) to “1” <#5
60>, both proceed to step <#570>.

In the <<3rd depth calculation>> routine, the second defocus amount (DF2) is subtracted from the used defocus amount (DFヮ>) to obtain the second defocus difference (DFd.) for depth calculation <#572>; Next, the second defocus difference (
DFd2) is used to find the third depth priority aperture value (Avd3) using equation (vi) shown above <#574>.

Next, the third depth priority aperture value (Avda) is compared with the open aperture value (Avo) and the maximum aperture value (Avm), and the third depth priority aperture value (Avda) is determined. If it is smaller than the open aperture value (Avo), set the open aperture value (Avo) to the third depth priority aperture value (Avd3) <#582>. In this case,
The third depth priority aperture value (Avd3) is the maximum aperture value (Av
o) and the maximum aperture value (Avm), call the subroutine <<Brightness calculation 3>>, perform weighted averaging according to the selected focus area, and calculate the third brightness value (BV3). After finding <1584>, on the other hand, if the third depth priority aperture value (Avda) is larger than the maximum aperture value (Avm), it is no longer possible to narrow down the aperture value, so the third depth priority aperture value (Avda) is determined.
After setting the depth calculation flag (DPF.) to “l”
80>, both proceed to step <1590>.

The calculation formulas for the second brightness value (BV2) and third brightness value (Bva) in <<Brightness calculation 2>> and <<Brightness calculation 3>> described above are summarized in Table 3 on the next page.

Note that this table lists only the case of "Panorama mode". In the case of ``Full-size mode'', the first
As in the case of the brightness value (By+), the calculation can be performed by adding a term for the photometric value of the surrounding area to the calculation formula in Table 3.

In step <#590>, a camera shake shutter speed value (Tvf) corresponding to the camera shake limit is determined from the focal length value (r)° of the photographing lens (2). Next, the above-mentioned 3
depth calculation flags (DPFI), (DPFg),
Depending on the value of (DPF3), <#592>~<#
596 >The first depth calculation flag (DPF r ) is “
0", the first depth priority aperture value (Avd+) is determined, the routine proceeds to the "first depth priority program calculation" routine following step <#600>, and the first depth priority aperture value (Avd+) is obtained. ) is not found and the second depth calculation flag (DPF2) is "0" and the second depth priority aperture value (Avd=) is found, <#620>
Proceeding to the routine of ``second depth priority program calculation'' following the step , the third depth calculation flag (DPF3) is set without obtaining any of the first and second depth priority aperture values (Avd + ) and (Avd2). If only the depth priority aperture value is found, proceed to the routine of "Third Depth Priority Program Calculation" following step <#640>; if no depth priority aperture value is found, proceed to <#660>.
＞Proceed to the ``Normal Depth Program Calculation'' routine below.

First, in <<first depth priority program calculation>>, the first exposure value (Ev+) is determined from the first brightness value (Bv+) and film sensitivity value (Sv) <#600>, and then the previously determined The depth-priority exposure value (Ev
e) is determined <#602>, and their first exposure value (Ev+
) and the depth priority exposure value (Eve) <#60
4>.

If the first exposure value (Ev+) is smaller than the depth priority exposure value (Evc), program control using this first exposure value (Ev+) is not possible, so do not proceed to the following steps.
Proceed to step <#594>.

On the other hand, the lth exposure value (Ev+) is the depth priority exposure value (Ev
c) If it is above, the first exposure value (Ev+), the depth priority exposure value (Eve), and the first depth priority aperture value (Avd r
), use the formula Av = (Ev+-Evc) / 2 + Avd to find the aperture value to be used (Av) <#606>, and compare the aperture value to be used (Av) and the maximum aperture value (Avm). <#608>.

Only when the used aperture value (Av) exceeds the maximum aperture value (Avm), the maximum aperture value (Avm) is set to the used aperture value (Av
), <#610>, then subtract the used aperture value (Av) from the first exposure value (Eve) to find the used shutter speed value (Tv) <#612>, and then,
Proceed to step <#680>.

Next, in the "second depth priority program calculation", the second exposure value (Evz) is calculated from the second brightness value (By!) and the film sensitivity value (Sv) <#620>, and then Depth priority exposure value (Eve
) is determined <#622> and their second exposure value (EV2
) and the depth priority exposure value (Evc) <#62
4>.

If the second exposure value (Evz) is smaller than the depth priority exposure value (Evc), program control using this second exposure value (Ev2) is not possible, so do not proceed to the following steps.
Proceed to step <#596>.

On the other hand, the second exposure value (EV2) is the depth priority exposure value (Ev
e) If it is above, the second exposure value (EV2), depth priority exposure value (Eve), and second depth priority aperture value (Avdz)
Using the formula, Av = (EV2-Evc) / 2 + Avd2, find the aperture value to be used (Av) <#626>, and compare the aperture value to be used (Av) and the maximum aperture value (Avm). <#628>.

Only when the used aperture value (Av) exceeds the maximum aperture value (Avm), the maximum aperture value (Avm) is set to the used aperture value (Av
) <#630), then subtract the used aperture value (Av) from the second exposure value (EV2) to find the used shutter speed value (Tv) <#632>, then <
Proceed to step #680>.

Furthermore, in ``Third Depth Priority Program Calculation'', the third
The third value is determined from the brightness value (BV3) and film sensitivity value (Sv).
Determine the exposure value (EV3) <#640>, then determine the depth priority exposure value (E
ve) is determined <#642>, and their third exposure value (Ev
s ) and the depth-priority exposure value (Evc) <#
644>.

The third exposure value (EV3) is the depth priority exposure value (Evc)
If it is smaller than , program control using this third exposure value (EV3) is not possible, so the process does not proceed to the following steps, but proceeds to the <<Normal Depth Program Calculation>> routine following step <#660>.

On the other hand, the third exposure value (Evs) is the depth priority exposure value (E
ve) or higher, the third exposure value (Eva), depth priority exposure value (Eve), and third depth priority aperture value (Avd
．． ．． ), Av = (EV3 − Eve) / 2 + Avd
Find the aperture value (Ay) to be used using the formula s<#646>
, the used aperture value (Av) and the maximum aperture value (Avm) are compared <#648>.

The maximum aperture value (Avm) is used only when the aperture value (Av) exceeds the maximum aperture value (Avm).
) as <1650>, then subtract the used aperture value (Av) from the third exposure value (Evs) to find the used shutter speed value (Tv) <#652>, then <
Proceed to step #680>.

Finally, in <<normal depth program calculation>>, the lth exposure value ('Ev+) is calculated from the first brightness value (Bv r ) and film sensitivity value (Sv). <#660> Then, open aperture value (Avo) and hand shaker shutter speed value (Tvf
) to find the depth priority limit exposure value (Evc+)<#
622>, the first exposure value (Ev+) and the depth priority limit exposure value (Evc+) are compared<#664).

The first exposure value (Ev r ) is the depth priority limit exposure value (E
If it is larger than the first exposure value (Evt), subtract the hand shaker shutter speed value (Tvf) to use the aperture value (Av) <#666>,
Tvf) Use shirt speed value (Tv) Binding <#6
66>, then proceed to step <#680>.

On the other hand, the lth exposure value (By+) is the depth priority limit exposure value (
Evc+), subtract the open aperture value (Avo) from the first exposure value (Ev+) and use the shutter speed value (Tv) <#670>, open aperture value (Avo)
Set the aperture value (Av) to be used <#672>, then <#
Proceed to step 680>.

The calculation control in the four program calculations mentioned above is summarized based on the program diagram in FIG. 25. In the figure, the line (a) is <#610>. <#63
0>. The maximum aperture value (A
vm) is used as the aperture value (Av), and in the figure (
Lines b) are <#606>, <#626>, <
#646>, the lines (C) and (d) in the figure show the calculations in the routine of <<normal depth program calculation>>. In the figure, the point (p) represents the depth priority limit exposure value (Even), the line (C) represents the calculation in step <#666>, and the line (d) represents the calculation in step <#670>. The calculations in each are shown.

Now, after determining the aperture value (Av) and the shutter speed value to be used using any of the four program calculations described above, in step <#680>, the aperture value (Av) to be used is determined.
v) into a depth-priority F-number (FNO), and then, using this depth-priority F-number (FNO), the following formula DFc = FsoX (β・δ) (X
) to find the corrected defocus amount (DFc) from the focus position (FP) <#682>.

Next, the obtained corrected defocus amount (DFc) is converted into a pulse value (LDc) for driving the lens.<#684>
, based on the pulse value (LDc), the photographing lens (2)
After driving the movable lens to the corrected focus position <#686
> , return to the original routine.

The flowchart in FIG. 12 is based on the subroutine <<
This is a ``normal calculation'' routine that branches from the exposure calculation to ``program mode'' and ``flash mode.''

In this routine, first, subroutine <<luminance calculation 4>>
and depending on the selected focus mode,
Find the main brightness value (+3VM) of the main subject <#700>,
Next, the subroutine <<Brightness calculation 5>> is called to obtain the sub-brightness value (BvA) of a sub-subject other than the main subject according to the selected focus mode and screen size mode<#702>.

Arithmetic expressions for determining both brightness values (BVM) and (BvA) are summarized in Table 4 on the next page. The "selected area" and "nearby area" in the table are the same as those in Tables 1 to 3 listed above.

Next, determine whether it is in <<Flash mode>><#710
>, in the case of <<flash mode>>, the process proceeds to the <<flash program calculation>> routine following step <#720>, and if it is not <<flash mode>>, it is subsequently determined whether or not there is a backlight condition based on the photometry data. Discern <#7
12>, if it is a backlit situation, use only the main brightness value (BVM) and calculate the exposure value (Ev) from the formula Ev = BvM + SV <#714>, on the other hand,
If it is not a backlit situation, the main brightness value (BVM) and the secondary brightness value (
Using the formula Ev = (BVM + BVA) / 2 + Sv, calculate the exposure value (Rv) by averaging the brightness value from the selected area and the brightness value from the surrounding area <#716> ,
In either case, after performing program calculation and determining the aperture value (Av) and shutter speed value (Tv) to be used from the obtained exposure value (Bv) based on a predetermined program diagram, <#718 >, return to the original routine.

On the other hand, <172 which branches in the case of <<Flash mode>>
In the "flash program calculation" routine following step 0>, first, after lighting the flash display,
#720>, the camera shake shutter speed value (Tvf) at the camera shake limit is determined from the focal length (f) of the photographic lens (2) <#722>. Next, it is determined whether the mode is <<Panorama mode>><#724>.

In the case of <Panorama mode>, the synchronization shutter speed value (Tvx) for flash photography is set to "8", which corresponds to [1/250 second], since high-speed synchronization is possible as mentioned above. <#726>, <<Full size mode>>
In this case, the tuning shutter speed value (Tvx) is set to "7" corresponding to [1/125 second] as in the normal case <#728>.

After that, the set tuning shirt speed value (TVX
) and the hand shaker speed value (Tvf).
730>, after setting the hand movement shirt starter speed value (Tvf) as the tuning shirt starter speed value (Tvx) only if the tuning shirt starter speed value (Tvx) is smaller than the hand movement shirt starter speed value (Tvf). <#732>
, open aperture value (Avo) and camera shaker shutter speed value (T
vf), find the limit exposure value (Eve)<#73
4>.

Next, it is determined whether or not there is backlighting based on the photometric data.
#736> In the case of a backlit situation, the secondary brightness value (BVA) of the secondary subject other than the main subject is used, and since the flash is emitted for the main subject, Ev = Ev = so that the surrounding area is over [IEv]. The exposure value (Ev) is calculated using the formula BvA+Sv 1 <#738>. On the other hand, if there is no backlight, the main brightness value (BVM) and the secondary brightness value (BVA) are averaged and the flash is fired. Ev = (BVM+BVA) /2 +Sv + 1 so that the whole is under [IEv]
The exposure value (Ev) is determined by the formula <#740>. In either case, the obtained exposure value (Ev) is then compared with the limit exposure value (Evc) <#750>.

If the exposure value (Ev) is below the limit exposure value (Evc) and it is dark, use the camera shaker shutter speed value (Tvf). After using aperture value (Av) <#762
＞, determine whether it is ``Panorama mode'' or not ＜#764＞,
In the case of <Panorama mode>, the film sensitivity value (Sv
) plus "1/3" is set as the dimming data <#766> On the other hand, in the case of <Full size mode>, the film sensitivity value (Sv) is set as the dimming data as it is. Then <1768> Return to the original routine.

Here, to explain the meaning of adding "1/3" to the film sensitivity value (Sv) as light control data in the case of "Panorama mode", as already explained, "Panorama size" is "Full size". ] Only the middle part between the top and bottom of
Now, the shutter opening (20a) is connected to a pair of upper and lower light shielding plates (
21A). (21B) to block light. Therefore,
As shown in Figure 14 (0) and (c), the film (F)
The amount of light that is reflected by the camera and enters the light receiving element (107) for flash dimming during flash photography is also smaller in the panorama mode shown in Figure 14 (c) than in the panorama mode shown in Figure 14 (0). Less than ``full size mode''. Therefore, between these two modes, it is possible to appropriately determine the amount of flash light incident on each photographic screen without changing the sensitivity of the light receiving element (107). In other words, in the light control circuit of this camera, the light receiving element (
107) plus photometric data is compared with a reference value, and when it exceeds the reference value, a light emission stop signal is output.
In this case, by adding a constant of "1/3" to the above photometric data, the light control level is effectively lowered and it is judged that the appropriate exposure amount has been reached earlier than in the normal case, resulting in overexposure. This has been prevented.

Now, in step <#750>, the exposure value (E
If it is determined that v) is larger than the limit exposure value (Eve), then subtract the open aperture value (Avo) from the exposure value (By) to obtain the used shutter speed value (Tv). #770>, its used shirt speed value (T
Use the tuned shirt speed value (Tvx) only when v) is larger than the tuned shirt speed value (Tvx). After setting the tuned shirt speed value (Tv), <#772>,
<#774> Then, subtract the obtained shutter speed value (Tv) from the exposure value (Ev) to obtain the aperture value (Av) <#776>, and then calculate the aperture value (Av).
v) is larger than the maximum aperture value (Avm), use the maximum aperture value (Avm) as the used aperture value (Av) <#7
78>, <#780>.

Next, it is determined whether or not there is a backlight condition <#782>.

In the case of a backlit situation, since the exposure value (Ev) was previously calculated using only the photometric data of the peripheral area in step <1738>, the flash adjustment is performed using the main brightness value (BV, I) of the main subject. In order to find the dimming correction value (△Sv) for light, first △Ev = Av + TV (BVM + SV) + 1
Calculate the correction exposure value (△Ev) using the formula <178
4>.

To explain the meaning of the above formula, as shown in Figure 27,
The main exposure value (EvM) for the main subject is the main brightness value (B
vM) and the film sensitivity value (Sv), while the appropriate exposure value (EVI) is determined as the sum of the previously determined aperture value (Av) and shutter speed value (Tv) used. Therefore, the correction exposure value (△Ev) obtained as the difference between the exposure value (Ev) obtained from the photometric data of the surrounding area and the above-mentioned main exposure value (EvM) is the appropriate exposure value (EvI)
to the main exposure value CEVM), and then
It is obtained by adding "l" set to [IEv] over in step 38>.

Next, from the obtained correction exposure value (△Ev), calculate the dimming correction value (△Sv) with reference to the table <#786>
, Next, determine whether it is "Panorama mode" or not.
788>, in the case of <Panorama mode>, the sum of the film sensitivity value (Sv), the above flash adjustment value (△Sv), and "1/3" of the constant for adjusting the screen size described above is adjusted. After setting it as optical data <8790>, also <<
In the case of full size mode, the film sensitivity value (Sv
) plus only the dimming correction value (ΔSv) is set as dimming data <#792>, and then the process returns to the original routine.

On the other hand, if it is determined in step <#782> that the situation is not backlit, it is then determined whether the mode is in <#794>, and if it is in <#794>, then <# In step 740>, the dimming data is obtained by adding "1" for the overall [IEv] under setting and "1/3" of the constant for screen size adjustment mentioned above to the film sensitivity value (Sv). After setting <#796>, and in the case of <<full size mode>>, the same <
] “1” for the under setting is the film sensitivity value (S
After setting the value added to v) as dimming data <#
798>, both return to the original routine.

The calculation control in the above-mentioned <<flash program calculation>> is summarized based on the program diagram shown in FIG. 26. Point (q) in the diagram is the limit exposure value (Eve)
, and for exposure values below this, <#760
>, <#762> is controlled to this point (q) by the calculation in steps.

In addition, the line (e) in the figure shows the calculation at step <#770>, and the line (f) in the figure shows the calculation from <#776> to
The calculation in step <#780> is shown.

In the camera described above, the CPU (100) constitutes the focus detection means, and the CPU (100), the driver (110), and the AF motor (AFM) constitute the focus adjustment means. Further, the CPU (100) constitutes a depth of focus adjustment means, a focus adjustment control means, and a depth of focus control means.

Examples by C] Next, another example of the present invention will be listed.

<1> Another embodiment for light control during flash photography will be described. As shown in FIG. 28, in this example,
Three light receiving elements (107a) to (107c) for dimming
is provided.

These three light receiving elements (107a) to (107c) are
The panoramic screen (F,) is the light receiving range, and the three focus areas (PL), (FC),
(pi).

For those three light receiving elements (107a) to (107c), as shown in FIG.
, each separate operational amplifier (130a) to (130c
) and switching elements (131a) to (131c), which are turned on by a control signal from the photometric circuit (103).
c) The light receiving elements (107a) to (10
7c) is transmitted through a logarithmic expansion transistor (
132) and is input to a comparator (134) for comparison with a reference value.

In the figure, (135) is a flip-flop for controlling the start of dimming, and (136) is a timer for controlling the end of dimming operation.

Operation control when performing dimming using these three light receiving elements (107a) to (107c) is as shown in FIG. 30, in step <#750> in FIG.
It is determined that the exposure value (Ev) is less than or equal to the limit exposure value (Evc), and after executing steps <#760> and <#762>, the light control position data, that is, the data selected for focus detection is The number of regions and neighboring regions is calculated <#900>, and according to the number, <#920>. <
#904> If there is one location, set the film sensitivity value (Sv) as dimming data.<#906> If there are two locations, the amount of light received will be doubled, so set the film sensitivity value (Sv) to correct this. Add "I" (=Iogz 2) to the above and set it as the dimming data <#908>, 3
In this case, the amount of light received will be tripled, so in order to compensate for this, the film sensitivity value (Sv) is set to "1.58" (= lo
g23) and set it as the dimming data.
#910>, both return to the original routine.

In addition, in this example, the light receiving elements (107a) to (10
7c), the light receiving range is limited to the panoramic screen (F,), but instead, the light receiving range is set to the full size screen (F,
), and may be combined with a configuration in which the compensation for the panoramic screen (F,) described in the previous embodiment is added and set as dimming data.

(2) The number of focus areas is not limited to three, and the number is not limited as long as it is plural.

(3) When performing the depth priority processing, it is sufficient to perform the depth priority processing on at least two objects among the plurality of objects located within the plurality of focus areas, and the configuration may be such that the number can be changed and set.

<4> In the previous embodiment, a structure was described in which depth priority processing is performed by both the aperture narrowing operation and the movement of the photographing lens (2) to the corrected focusing position. It may be possible to perform the correction only by narrowing down the diaphragm, or by moving the photographing lens (2) to the corrected focusing position. If the configuration is such that depth-priority processing is performed only by narrowing down the aperture, as in the former case, the camera does not have a configuration for focus adjustment, for example, when the photographing lens (2) is in the in-focus position with respect to the subject. It is also possible to implement this method for a camera having a so-called focus aid function, which only has a function of detecting whether or not the object is in focus.

<5> The specific structure of the focus detection means can be changed as appropriate; for example, various detection principles can be adopted.

〔Effect of the invention〕

As described above, the camera of the present invention can:
Even when multiple objects with different positions in the far and near directions are within the shooting range, the images of those multiple objects can be displayed within the depth of focus very quickly without changing the camera's posture. Now, it is now possible to take in-focus photos of multiple subjects at different positions in the distance direction, without the need for complicated operations, and without the risk of missing an important photo opportunity.

In particular, when the aperture operation and movement of the photographic lens are performed together for this purpose, the amount of aperture can be reduced, which makes it possible to reduce the amount of aperture, making it possible to reduce the amount of aperture. Even if there is such a thing, it is possible to perform photography with priority given to the depth of field without any problem, which makes it even more useful.

[Brief explanation of the drawing]

Figures 1 to 27 show embodiments of the camera according to the present invention, in which Figure 1 is a block diagram of the internal electric circuit, Figure 2 is a plan view, Figure 3 is a front view, and Figure 4 is a rear view. , Figures 5 to 12 are flow charts showing the operation of the camera, and Figure 13 is a flowchart showing the operation of the camera.
The figure is a front view of the film, Figures 14 (a) to 14 (c) are sectional views of the shutter part, Figures 15 (a) and 15 (opening) are rear views of the light shielding member part of the shutter, and Figures 16 and 1
Figure 7 is a schematic diagram of the drive mechanism of the light shielding member of the shutter, No. 18.
Figures (a) and (b) are rear views of the shutter blades;
Fig. 19 is a cross-sectional view of the photo ink section of the shutter, Fig. 20 is a front view of the photographing screen, Figs. 21 (a) to (c) are front views of the viewfinder field of view, and Fig. 22 is the shutter travel time. Chart, Fig. 23 is an explanatory diagram of depth of focus, Figs. 24 (A) to (C) are explanatory diagrams of depth priority processing, Fig. 25 is a program diagram of depth priority processing, and Fig. 24 is an explanatory diagram of depth priority processing.
FIG. 6 is a program diagram for flash photography, and FIG. 27 is an explanatory diagram of correction control of light adjustment data. 28 to 30 show another embodiment, FIG. 28 is a perspective view of the photographing optical path, FIG. 29 is a circuit diagram of a dimming circuit, and FIG. 30 is a flowchart for correcting dimming data. .

Claims (1)

[Scope of Claims] 1. In a camera equipped with a focus detection means for detecting a deviation from a focus position of a photographing lens with respect to a subject located within a focus detection area within a photographing region, a plurality of the focus detection means are configured to include: The aperture of the photographing lens is automatically adjusted so that at least two of the subjects located in the plurality of focus detection areas are imaged within the depth of focus, and the aperture of the photographing lens is provided corresponding to a plurality of focus detection areas having different set positions. A camera equipped with means for adjusting the depth of focus. 2. The depth of focus adjustment means automatically sets the aperture,
Claim 1: This is achieved by narrowing down the aperture.
Camera listed. 3. A focus detection means for detecting a deviation from the in-focus position of the photographing lens with respect to a subject located in a focus detection area within the photographing region; and a focus detection means for moving the photographing lens toward the in-focus position based on the detected deviation by the focus detection means. In the camera, a plurality of focus detection means are provided corresponding to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, A camera comprising a focus adjustment control means for operating said focus adjustment means such that at least two images are both formed within a depth of focus. 4. The focus adjustment control means operates the focus adjustment means to move the photographing lens from a focus position for one subject to a corrected focus position biased toward a focus position for another subject. A camera according to claim 3. 5. Focus detection means for detecting a deviation from the in-focus position of the photographing lens with respect to a subject located within a focus detection area within the photographing region, and moving the photographing lens toward the in-focus position based on the detected deviation by the focus detection means. In the camera, a plurality of focus detection means are provided corresponding to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, and a plurality of focus detection means are provided to correspond to a plurality of focus detection areas having different setting positions, The camera is provided with a depth of focus control means for automatically setting the aperture of the photographing lens and operating the focus adjustment means so that at least two images are formed within the depth of focus. 6. The depth of focus control means automatically sets the aperture by narrowing down the aperture, and sets the photographing lens to a corrected focus position biased from a focus position for one subject to a focus position for another subject. 5. The focus adjustment means is operated to move the focus to
Camera listed.