JPH049932A - Camera having automatic focusing device - Google Patents

Abstract

PURPOSE:To discriminate the focused state of an object after executing focus locking operation by displaying a prescribed display in a finder at the time of detecting that the object in a range finding frame is present in a prescribed area. CONSTITUTION:A line sensor consisting of standard parts (1-1) to (4-1) and reference parts (1-2) to (4-2) is formed on the CCD base of the camera and focus detection is correlationally executed while shifting the images of the standard parts (1-1) to (4-1) corresponding to range finding area AR3 to AR6 to that of the reference parts (1-2) to (4-2). At the time of detecting the presence of an object image in a prescribed range finding area in a focused state, a display 36 in the finder is constituted so as to light up e.g. with green in accordance with a detected output.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a camera, and more particularly to a camera that measures the shooting distance to a subject and automatically adjusts the focus.

[Prior Art] In recent years, there have been an increasing number of cameras that have a so-called autofocus function that automatically adjusts the focus. Such cameras generally have a distance measurement frame displayed in the finder that indicates the distance-measured position of the object, so that the photographer can be informed of which object is in focus.

[Problems to be Solved by the Invention] Since the above-described camera is generally used by focusing on the subject within the distance measurement frame, there is no problem in checking the in-focus state of the subject within the distance measurement frame. However, it requires considerable skill and experience to judge whether or not objects that are not included in the distance measurement frame are in focus, and it is not easy for beginners to make such judgments accurately. do not have.

Japanese Unexamined Patent Publication No. 1-134320 discloses a camera object distance measuring device that displays distance measuring areas that do not fall within the same depth among objects in distance measuring areas extracted during focus adjustment.

However, such a measuring device displays a distance measurement area outside the depth of field only during focus adjustment, and is therefore not suitable for use in re-determining the composition after focus locking.

This invention was made to solve the above-mentioned problems, and provides a camera that allows even beginners to easily check the in-focus state of a subject outside the distance measurement frame after focus lock or focusing. That's true.

[Means for Solving the Problem] A camera having an automatic focus adjustment device according to claim 1 is a camera having a focus lock function, and includes a detection means for detecting a photographing distance to a subject, and a detection means in a viewfinder. a first display means for displaying the position of the object to be detected as a distance measurement frame; and after focus lock, detecting that the object in the distance measurement frame is in a predetermined area based on the detected shooting distance. a detection means, and a second display for displaying a predetermined display in the viewfinder in response to the detection output of the detection means.
It is equipped with a display means.

A camera having an automatic focus adjustment device according to a fourth aspect of the present invention includes a detection means for respectively detecting shooting distances of a plurality of positions of a subject, and a detection means in a viewfinder that detects the position of the subject to be detected as a plurality of distance measurement frames. a display means for displaying a display; a focus adjustment means for adjusting the focal position of the photographing lens to bring the image of the subject into focus based on the detection output of the detection means; and after the image of the subject is brought into focus by the focus adjustment means; a detection means for detecting that each of the objects in the distance measurement frame is within the depth of field; and a predetermined display on the corresponding object at a position related to the distance measurement frame in response to a detection output from the detection means. The apparatus is equipped with a depth display means for displaying depth.

A camera having an automatic focus adjustment device according to a fifth aspect of the present invention includes a detection means for detecting photographing distances of a plurality of positions of a subject, and a plurality of distance measurement frames in which the positions of the subject to be detected by the detection means are arranged in a finder. A display means for displaying a display, a detection means for each detecting that each of the subjects in the distance measurement frame is within the depth of field based on the detection output of the detection means, and a countermeasure in response to the detection output from the detection means. and control means for controlling the display means so as to display only the distance measurement frame of the subject.

[Operation] In the invention according to claim 1, it is possible to determine the in-focus state of the subject within the distance measurement frame after focus lock.

In the invention according to claim 4, after the in-focus state is reached,
A predetermined display is performed at a position related to a ranging frame that includes a subject within the depth of field.

In the invention according to claim 5, only the distance measurement frame including the subject within the depth of field at the time of photographing is displayed in the finder.

[Embodiment] FIG. 1 is a block diagram showing the main configuration of a camera according to an embodiment of the present invention.

In the figure, light incident through a photographic lens 9 is reflected by a finder mirror 4, enters a pentaprism 1 via a focusing plate 3 and a transmissive liquid crystal (LCD) 2, and then passes through a finder lens 18. and enters the photographer as an image.

On the other hand, a portion of the light incident on the finder mirror 4 in an amount necessary for focus detection passes through the mirror 4 and enters the focus detection section 8 via the submirror 5. The focus detection section 8 is equipped with an optical system necessary for performing focus detection, and includes a sensor, a data output section, and the like. Focus detection section 8
The data output from the control circuit 7 is input to the control circuit 7, and the control circuit 7 outputs data for controlling the focus detection sensor, sequence, and LCD drive circuit 6 based on the input data. The LCD drive circuit controls the transmissive liquid crystal 2 based on the control data output from the control circuit 7,
Performs various liquid crystal displays.

FIG. 2 is a diagram showing a specific configuration of the focus detection section 8 of FIG. 1.

In the figure, the light reflected from the sub-mirror 5 of FIG. 1 passes through the condenser lens 14 and is formed into four sets of light beams by the re-imaging lens 12, and is imaged onto the COD substrate 11. Autofocus (hereinafter referred to as rAFJ) in this example
This method is a well-known phase difference detection method. Here, the aperture mask 13 is set so as to overlap the re-imaging lens 12, and its aperture removes unnecessary light for focus detection coming from the condenser lens 14.

The CCD board 11 has a focus detection area aSb which will be explained later.
, c and d, pairs of line sensors 11-a, 11-b, 11-C and 11-d are formed thereon, respectively.

FIG. 3 is a diagram showing the state of a photographing screen of a camera according to an embodiment of the present invention.

In the figure, distance measurement areas corresponding to each line sensor formed on the COD board 11 of FIG. 2 are shown on the photographing screen 15.

FIG. 4 is a diagram showing a specific configuration of the line sensor on the CCD board 11 shown in FIG. 2.

In the figure, the reference parts are 1-1.2-1.3-1 and 4
-1, and the reference part consists of 1-2.2-2.3-2 and 4-2. Reference numbers 1-1 and 1-2
．． 2-1 and 2-2.3-1 and 3-2 and 4-
Each set of 1 and 4-2 is a corresponding standard part and reference part, and focus detection is performed by taking the correlation while shifting the image of the standard part with respect to the image of the reference part. .

Note that the reference section 2-1 does not use the entire data from the line sensor at once, but instead uses a,
It is divided into three blocks, b and C, and focus detection is performed by comparing the image of each block with the reference section 2-2.

FIG. 5 is a diagram showing the configuration of a control section according to an embodiment of the present invention.

In the figure, the control circuit (microcomputer μC) 7
Inputs are made from various switching means.

Switch SMD is an area mode changeover switch,
As a result of this turning on, an on signal is input to the boat P1.

The switch SCP is used to switch the spot area in the ranging area, and when it is turned on, the boat P2
On signal is input to. The switch SFL is a focus lock switch, and its on signal causes the boat P to
An on signal is input to 3. The switch S1 is a switch that is turned on by pressing the release button one step, and when it is turned on, an on signal is input to the port P4 and the AF operation is started. The on/off state of the switch S1 is determined based on the input from the boat P5. switch SM
is the main switch of the camera, and when it is turned on, an on signal is input to P7. The buzzer BZ emits a warning sound in response to a one-shot pulse from the control circuit 7.

On the other hand, data is inputted to the control circuit 7 from the focus detection section 8, and control data for controlling the focus detection section 8 is outputted from the control circuit 7. Further, the control output of the control circuit 7 controls the transmissive liquid crystal (LCD) 2 and the light emitting element (LED) 23 via the liquid crystal control section (LCD/C) 6. Furthermore, the control output of the control circuit 7 is controlled by the lens drive circuit (
It is connected to the LE-C) 20 and controls the autofocus lens drive. Further, data indicating the lens position is input from the lens (LE) 21. Photometry circuit (LM)
From 22, data corresponding to the subject brightness is input to the control circuit 7.

FIG. 6 is a diagram showing a control flow performed when the main switch SM is turned on.

Before going into the explanation of the flow of masking, I will explain the display in the finder.

FIG. 10 is a diagram showing the situation inside the finder that changes when the mode switch SMD is turned on.

The screen shown on the left side of the upper column is in a state controlled by the area value ARI, and shows the largest area including all of the ranging areas a to C in FIG. 3 as the ranging frame. The state in the center of the upper column is a diagram showing the state of the ranging frame controlled by the area value AR2, and shows the state when the focus is detected by blocks a and b of the reference section 2-1 in FIG. ing. The upper column shows the state of the ranging frame controlled by the area value AR3, and shows the state when non-inspection 8 is performed based on the block of the reference section 2-10 in FIG. There is.

The left side of the bottom column shows a so-called frameless state in which no ranging frame is displayed.

FIG. 11 is a diagram showing the state of the ranging frame in the spot mode, which is changed by turning on the mode switch SMo and the spot switch SSP.

The ranging frame represented by the area value AR3 in the figure corresponds to the ranging area a in FIG. 3, and the ranging frame indicated by the area value AR4 corresponds to the ranging area a in FIG. 3. It corresponds to b,
The ranging frame represented by area value AR5 corresponds to ranging area C in FIG. 3, and the ranging frame indicated by area value AR6 corresponds to ranging area value d in FIG. It corresponds to As shown in the figure, when the spot switch is turned on, the position of the ranging frame changes sequentially and cyclically.

FIGS. 12A to 12T are diagrams showing displays in the finder according to each photographing situation. In particular, FIG. 12A shows all the displays within the finder.

In the figure, a display 31 shows a ranging frame in a wide state when the area value is ARI, a display 32 shows a ranging frame using an area value AR2, and a display 33 shows a ranging frame using an area value AR4. This shows the frame. Note that the broken line corresponds to the distance measurement area in FIG. 3, and is not actually displayed in the finder. The display 34 is displayed when the subject in each ranging frame is within the depth of field. Display 35 is one-shot switch S. N/.

Display 3 is displayed when the switch is turned on.
6 is lit in green when in focus, and display 37 is displayed when focus is locked. Although the display 36 is shown as a circle in the figure, it is not actually displayed in the viewfinder at all when it is not lit or blinking.

As mentioned above, there are various display functions in the finder.
This allows the photographer to accurately grasp the photographing situation and improves usability.

The details of the control will be explained below according to the flowchart shown in FIG.

First, this routine is entered by turning on the main switch SM, and in step S1, the one-shot switch S is turned on.

N/. It is determined whether or not it is turned on. When that switch is on, the one-shot flag is 0NSF.
is set to 1 and the process proceeds to step S3, where the distance measurement area is displayed. Note that when the main switch SM is turned on, the flag DISPF, which is set when displaying the distance measurement frame, is set to 1 as an initial value, and the one-shot AF
The flag 0NSF set when is 1, the area value is ARI, and the spot ranging area value 5PAR is AR.
3, and the other flags are in a reset state.

Next, in step S4, it is determined whether the mode switch is on. When this switch is on, it is determined in step S5 whether a flag SPMF indicating the spot area mode is 1 or not. When this flag is 1, SPMF is set to 0 in step S7, flag DISPF is set to 1 in step S8, and then step S9
Proceed to.

When the spot mode flag is not 1, the value of the flag DI SPF is converted in step S6, and then in step S9
In this case, the spot flag SPF is set to 0. In step S10, data of the photographic lens is input, and in step S1
Aperture value AFAY that allows AF with l. is a predetermined value, for example 6
．． It is determined whether the number is 7 or more. Aperture value A F A
When V o is smaller than a predetermined value, it is determined whether the photographing lens is a reflective telephoto lens (S13). When the photographic lens is a reflective telephoto lens, the area value is set to AR3 in step S15. That is, in a reflective telephoto lens, the focus cannot be detected unless the area value is AR3, that is, the smallest distance measurement frame state.

When the photographic lens is not a reflective telephoto lens, step S1
4, the area value AR is set to AR2, and then in step S16
After setting the spot flag SPF to 1, the process proceeds to step S17.

On the other hand, if the mode switch is not turned on in step S4, steps 85 to 816 are not performed and the process directly advances to step S17.

Next, in step S17, it is determined whether the mode switch SM0 is on. When this switch is on, the spot switch SSP is turned on in step S25.
It is determined whether or not is on. That is, only when the mode switch and the spot switch are on at the same time, the process proceeds to step S26, and after setting the spot mode flag SPMF to 1, it is determined in step S27 whether the spot flag SPF is 1 or not. When the spot flag is 1, area value AR2 is set to AR3 in step S29, and when the spot flag is not 1, area value A is set.
After setting R to the spot area value 5PAR, step S3
If the flag is 0, the flag DISPF is set to 1 and the process returns to step S1.

On the other hand, if the mode switch is not on in step S17, it is determined in step S18 whether the flag SPMF is 1 or not. If this flag is not 1, the process returns to step S9, but if this flag is 1, it is determined in step S19 whether or not the spot switch has been turned on. When the spot switch is turned on, it is determined in step S20 whether the flag SPF is 1 or not.

When this flag is 1, in step S23, the area value A
After setting R to AR3, the process proceeds to step S24.

When the spot flag SPF is not 1, step S21
The area value changes cyclically as AR3→AR4→AR5→AR6→AR3.

Then, in step 322, the area value selected in step S21 is set as the area value AR, and in step S24, the spot area value 5PAR is set as the area value AR, and then the process returns to step S1.

FIGS. 7 to 7C are diagrams showing the control flow performed when the release button is pressed to the first stage, that is, when the AF start switch S1 is turned on.

When the switch S1 is turned on, initial values of flags are set in step S40. That is, once the control flow is executed to determine the flag FLF that is set when the focus is locked, the flag AFEF that is set when the focus is on, and the defocus amount DF from the defocus amounts DF2 and DF4 to DF6. Each of the flags to be set l5TF is set to 0.

Next Nifrag 0NSF, AFEFSFLF, AR1~6,
The values of DP2F, DP4F-DP6F, DisPF, LCF and the flag MCROF, which is set when the imaging magnification β≧1/10, that is, in macro mode, are output to the data display circuit, and the AF area is displayed based on this data. will be carried out. Next, in step S42, the apex photometric value By is input, the exposure value EV is determined based on this value, and the control F value FNOC is determined based on this exposure value EV.

Next, in step 843, <AF data is input based on the position of the photographic lens. Then, in step S44, distance data D is input based on information based on the photographic lens, and in step S44, focal length data f is input. Based on these data, the imaging magnification β (β=f
/D) is calculated.

Next, it is determined whether the imaging magnification β is 1/10 or more. When the photographing magnification is greater than or equal to that value, it is macro photographing, so the flag MCROF is set to 1 in step S48, and when the photographing magnification is less than that value, the flag MCROF is set to 0 in step S49, and then the process proceeds to step S50. Next, in step S50, the flag LCF indicating that focus cannot be detected is set to 0.
In addition, the flags LCFa-c, 4 to 6 indicating that focus cannot be detected in the ranging frames for each ranging area a-C, area value AR2, and area value AR4 to AR6 are each set to 0, and the flag LCF2 is set to 0. Post step S5
At step 1, focus detection for each distance measurement area is performed.

Next, in step S52, flags L CF a - c and LCF indicating the focus undetectable state of the focus undetectable area are set.
Set 4 to 6 respectively. Note that the focus detection failure state occurs when the contrast value is low or when the reliability of distance measurement is low.

Then, in step S53, the area defocus amounts DFa-c and D F , a-6, where focus cannot be detected, are processed as large defocus amounts DF that cannot normally be taken.

Next, in step S54, the defocus amount DF of the area where focus detection is not possible is calculated. Next, in step S55, it is determined whether all flags L CF a - c are set. When all are set, the flag LCF2 indicating the center distance measurement area is set to 1 in step S57.
After that, the process proceeds to step S58, but the flag L CF a
-c is not all set, the defocus amount DF2 of the center area is changed to the defocus amount DFa, DF.
It is determined by a predetermined calculation based on the values of b and DFc, and the process proceeds to step 358.

In step S58, it is determined whether the area value AR is 1 or not. When this area value is 1, it is determined in step S59 whether flags LCF2 and LCF4-6 are all set. When all of these flags are set, the flag LC is set in step S61.
After setting F to 1, the process returns to step S41 and the AF area is displayed.

If this flag has not been set in step S59, a defocus amount DF is calculated in step S60, which will be described in detail below, and then the process proceeds to step S62. In step S62, it is determined whether the focus lock switch is turned on. When this switch is turned on, the flag FLF is set to 1 in step S63, and then the process proceeds to step S66. On the other hand, when the focus lock switch SFL is not on, it is determined in step S64 whether the focus lock switch has been turned off from on. When the focus lock switch is turned off, the flag FLF is set to 0 in step S65, and when the focus lock switch is not turned off, the process directly proceeds to step 866. Step S66 flag F
It is determined whether LF is 1 or not. When this flag is not 1, it is determined in step S67 whether the defocus amount DF is less than or equal to a predetermined value. When the defocus amount is less than a predetermined value, the flag AFE is set in step S68.
Let F be 1.

On the other hand, when the defocus amount DF is not less than the predetermined value,
In step S69, it is determined whether the flag AFEF is 1 or not. When this flag is 1, step S70
It is determined whether the flag 0NSF is 1 or not. When this flag is not 1, lens driving is started based on the defocus amount DF in step S71.

Next, in step S72, it is determined whether the lens has been driven by a predetermined amount. When not being driven, step S73
In step S73, it is determined whether the focus lock switch SF0 is turned on. If this switch is not on, the process returns to step S72, but if this switch is on, the flag FLF is set in step S74.
is set to 1, and the process advances to step S75, where lens driving is stopped.

On the other hand, if the lens is being driven by a predetermined amount in step S72, the process directly proceeds to step 75, where the driving of the lens is stopped, and further, after setting the flag AFEF to 0 in step S76, the process proceeds to step S77. Note that when the flag 0NSF is 1 in step S70, the process similarly proceeds to step S77.

After displaying the distance measurement frame in which the subject is within the depth of field in step S77, it is determined in step S78 whether the switch S1 is on. When this switch is on, the process returns to step S41 and the above operation is repeated, but the switch S
If 1 is not on, the display in the finder is turned off (step 579) and then the process returns.

On the other hand, when the area value AR is not 1 in step S58,
Proceeding to step S80, it is determined whether the area value AR is 2 or not. Step S when area value AR is not 2
Area determination is performed in step 81.

When it is determined that the area is 3, it is determined in step S82 whether the flag LCF3 indicating that focus detection is impossible is 1 or not. If this flag is 1, step 8
After setting the flag LCF to 1 in step S92, the process returns to step S41. When the flag LCF3 is not 1, DF3 is adopted as the defocus amount DF in step S83, and then the process proceeds to step S66.

When it is determined that the area is 4, it is determined in step S84 whether the flag LCF4 is 1 or not. When the flag is 1, the process similarly advances to step S41 via step S92. When this flag is not 1, DF4 is adopted as the defocus amount DF in step S85, and then the process proceeds to step S66.

When it is determined that the area is 5, it is determined in step S86 whether the flag LCF5 is 1 or not. When this flag is 1, the process similarly advances to step S41 via step S92. When this flag is not 1, DF5 is adopted as the defocus amount DF in step S87, and then the process proceeds to step S66.

When it is determined that the area is 6, it is determined in step S88 whether the flag LCF6 is 1 or not. When this flag is 1, the process similarly advances to step S41 via step S92. When this flag is not 1, DF6 is adopted as the defocus amount DF, and then step S66
Proceed to.

On the other hand, when the area value AR is 2 in step S80,
In step S90, it is determined whether the flag LCF2 is 1 or not. If this flag is 1, step S92
The process proceeds to step S41 via. When this flag is not 1, DF is set as the defocus amount DF in step s91.
After adopting 2, the process proceeds to step S66.

FIG. 8 is a flowchart showing specific details for determining the defocus amount DF in step S60 of FIG. 7B.

In the figure, it is determined in step 5100 whether the flag FLF is 1 or not. If this flag is 1, return as is, but if it is not 1, step 5101
It is determined whether the flag l5TF is 1 or not. When this flag is not 1, this flag is set to 1 in step 5102, and then in step 5103 it is determined whether a flag MCROF indicating whether photography is in macro mode is 1 or not. When this flag is 1, step 51
At step 04, it is determined whether the flag LCF2 is 1 or not.

When this flag is not 1, DF2 is adopted as the defocus amount DF in step 5105, and step 810
In step 6, the current area value AR is adopted as the area value ARi.

On the other hand, when the flag MCROF is not 1 in step 5103, after removing the data in the distance measurement area where the focus cannot be detected in step 5107, for example, the nearest distance measurement area or the area where the current defocus amount DF is the smallest is selected. Based on this, an area value ARi is determined to achieve a focused state.

Further, when the flag LCF2 is 1 in step 5104, the process similarly proceeds to step 5107, where the area value ARi is determined.

Then, in step 5111, the defocus amount DF obtained in step 31.07 is set as the determined defocus amount LDF, and the ranging area value ARi determined in step S1]2 is returned as the determined value LAR. .

On the other hand, when the flag l5TF is 1 in step 5IOI, it is determined in step 5108 whether or not the LCF of the LAR area is set.

If not set, in step 8109 the defocus amount DF is set as the defocus amount DFi of the distance measurement area, and then the absolute value of the difference between the defocus amount LDF and the defocus NDF determined in step 5ILO becomes a predetermined value. 1
It is determined whether or not the value is greater than or equal to the value. Note that 1 in this predetermined value indicates the seventh
This value is larger than the predetermined value used in step S67 in Figure B. If the absolute value is not greater than 1 to the predetermined value, the process proceeds to step 5111, but if it is greater than or equal to the predetermined value, the process proceeds to step 5113, in which the minimum value of the difference from the LDF focal point detection focus amount DF2 or DF4 to 6 is determined. search.

Then, the defocus amount DF is set as DFA, and the corresponding distance measurement area is set as ARi. Then, in step 5114, DFA is adopted as the defocus amount, and in step 5115, it is determined whether the absolute value of the difference between LDF and DF is a predetermined value of 8 or more. When the predetermined value is less than 1, step 51
11, but if the predetermined value is 1 or more, step 8116
It is determined whether the flag AFEF is 1 or not. When this flag is 1, the process returns after setting the flag FLF to 1 (step S117), but when this flag is not 1, the process proceeds to step 5103.

FIG. 9 is a flowchart showing the specific contents of the routine for displaying the distance measurement area within the depth of field in step S77 of FIG. 7B.

First, in step 5120, it is determined whether the flag FLF is 1 or not. If this flag is not 1, step 51
At step 34, the flag FLIF is set to 0 and the process returns. When the flag FLF is 1, it is determined in step 5121 whether the flag FLIF is 1 or not. When this flag is not 1, flag FLIF is set to 1 in step 5122.
After that, a buzzer is issued in step 5123. If the flag FLIF is 1 in step 5121, the process directly advances to step 5124 without giving a buzzer notification.

In step 5124, the focal length f and the control aperture value F
Depth of field DP is determined based on NOC. Then, in step 5125, the depth of field flag DP for each area is set.
After setting 2F and DP4 to 6F to 0, step 8
At step 126, it is determined whether the defocus amount DF2 of area 2 is less than or equal to half the depth of field DP. When the depth of field is less than 1/2, the flag DP2F is set to 1 in step 5127, and the process proceeds to step 5128. However, when DF2 is not within 1/2 the depth of field, the process directly proceeds to step 5128. move on.

The following steps 8128, 5130. Step 5
At step 132, it is determined whether the defocus amount of each of the distance measurement areas 4.5 and 6 is equal to the 1/2 depth of field. Similarly, when the defocus amount is 1/2 the depth of field, the corresponding flag is set to 1 and the process returns.

[Effects of the Invention] As described above, the invention according to claim 1 can determine the in-focus state of the subject within the distance measurement frame after focus lock, and thus improves usability.

As explained above, in the invention according to claim 4, after the in-focus state is achieved, a predetermined display is performed at a position related to the ranging frame that includes the subject within the depth of field, so that the in-focus state is achieved. The included subjects can be easily confirmed.

As explained above, in the invention according to claim 5, since only the distance measurement frame including the subject within the depth of field at the time of shooting is displayed in the finder, the subject included in the focused state can be easily confirmed. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the main parts of a camera according to an embodiment of the present invention, FIG. 2 is a diagram showing the specific configuration of the focus detection section in FIG. 1, and FIG. FIG. 4 is a diagram showing the arrangement of the distance area, FIG. 4 is a diagram showing the specific arrangement of the CCD board in FIG. 2 corresponding to the distance measurement area in FIG. 3, and FIG. The block diagram, FIG. 6 is a flowchart that starts when the power switch is turned on according to an embodiment of the present invention, and FIGS. 7A to 7C are flowcharts that are controlled by turning on the switch S1 according to an embodiment of the present invention. 8 is a flowchart showing the specific details of the defocus amount determination in the step in FIG. 7B, FIG. 9 is a flowchart showing the specific content of the depth of field display routine in the step in FIG. 7B, and FIG. The figure shows the state of the ranging frame in the finder that changes when the mode switch is turned on according to an embodiment of the present invention, and FIG. FIGS. 12A to 12T, which are diagrams showing the states of the distance measuring frame, are diagrams showing display situations in various states in the finder according to an embodiment of the present invention. In the figure, 2 is an LCD display section, 6 is an LCD drive circuit,
7 is a control circuit, 8 is a focus detection section, 11 is a CCD board, 1
2 is a re-imaging lens, 13 is an aperture mask, 14 is a condenser lens, 15 is a shooting screen, 18 is a finder lens, 20 is a lens drive circuit, 21 is a shooting lens, 22 is a photometry circuit, 23 is a light emitting element, SMD is the area mode selector switch, SSP is the spot area selector switch, S, L
is the focus lock switch, Sl is the AF start switch, SoN/. is a one-shot/continuous changeover switch, SM is a main switch, and BZ is a buzzer. Note that the same reference numerals in each figure indicate the same or corresponding parts. Man 1 Figure 8 Collection, Hengsha Man 3 Figure N -[-=Th] Ditch 5 Figure 9 AR Figure 10 R2 R3 Figure 11 △R 8R ■ ○Δ"L @AFL ○△FL ○AFL

Claims (5)

[Claims] (1) A camera with an automatic focus adjustment device having a focus lock mechanism, which includes a detection means for detecting the shooting distance to the subject, and a distance measuring frame in the viewfinder for detecting the position of the subject to be detected by the detection means. a first display means for displaying, after focus lock, a detection means for detecting that the subject within the distance measurement frame is in a predetermined area based on the detected shooting distance; and a detection output of the detection means; and second display means for responsively displaying a predetermined display in the viewfinder. (2) Being in the predetermined area means that the subject image in the distance measurement area is in a focusing area.
A camera having the automatic focusing device as described. (3) A camera having an automatic focus adjustment device according to claim 1, wherein being in the predetermined area means that the subject within the ranging frame is within the depth of field. (4) Detection means for detecting shooting distances of a plurality of positions of a subject, display means for displaying the position of the subject to be detected by the detection means as a plurality of distance measurement frames in a finder, and detection of the detection means. a focus adjustment means that adjusts the focal position of the photographic lens based on the output to bring the image of the subject into focus; and after the focus adjustment means brings the image of the subject into focus, each of the subjects in the distance measurement frame Detecting means each detecting that the object is within the depth of field, and depth display means displaying a predetermined display at a position related to the distance measurement frame of the corresponding subject in response to a detection output from the detecting means. Also, a camera with an automatic focus adjustment device. (5) Detection means for detecting shooting distances of a plurality of positions of a subject, display means for displaying the position of the subject to be detected by the detection means as a plurality of distance measurement frames in a finder, and detection of the detection means. Detection means for detecting that each of the objects in the distance measurement frame is within the depth of field based on the output; and a detection means for detecting only the distance measurement area of the corresponding object in response to the detection output from the detection means. and control means for controlling said display means to display.