JP2938879B2 - Camera operation control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera operation control device capable of performing focus lock photographing.

B. Conventional technology For example, when the distance measurement information is stored with the half-press operation of the release button, and then after changing the framing and fully pressing the release button, the shooting lens is moved to the focusing position based on the stored distance measurement information. 2. Description of the Related Art A camera that can be driven to perform a shutter release, that is, a camera capable of so-called focus lock shooting has been conventionally known.

In addition, in response to the half-press operation of the release button, a camera that drives the taking lens to the focusing position based on the distance measurement information at that time, fixes the lens at that position, and performs a shutter release with a full-press operation of the release button. Is also known. Note that the distance measurement information is information indicating a distance to a subject, but the focusing lens is moved to a focusing position based on focus adjustment information indicating a shift amount and a direction between an image forming plane of a subject image and a planned image forming plane. A camera that performs such a focus lock is also known for a driven camera.

C. Problems to be Solved by the Invention However, in such a conventional camera, the focus lock is released by releasing the half-press operation. I can't hand over the camera while holding it. Therefore, if the third person requested to shoot does not know the focus lock shooting, if the main subject is not located in the auto focus frame in the viewfinder, the main subject will not be in focus and an undesired photograph will not be obtained. Will be photographed.

An object of the present invention is to enable a focus lock to be held even when a half-press operation is released, so that a photograph in which a desired subject is in focus can be obtained even when a third party is requested to shoot. It is an object of the present invention to provide a camera operation control device.

D. Means for Solving Problems Explained with reference to FIG. 1, a camera operation control device according to the present invention includes a focus adjustment information detecting means 101 for detecting focus adjustment information for focusing an imaging lens on a subject. With the preliminary operation of the release operation member 102 prior to the release operation, a focus lock means 103 that performs focus lock based on the detected focus adjustment information, a focus lock holding operation member 104 that instructs a focus lock holding mode, Activated when the focus lock holding operation member 104 is operated while the release operation member 102 is being preliminarily operated, even if the preliminary operation of the release operation member 102 is released or the preparatory operation is performed again thereafter. And focus lock holding means 105 for continuing focus lock.

Further, the invention of claim 1 further includes a release means 106 for releasing the operation of the focus lock holding means 105 when the focus lock holding operation member 104 is operated again after the release operation of the release operation member 102.

According to a second aspect of the present invention, when the focus lock holding operation member is turned on again while the release operation member is being preliminarily operated, the operation of the focus lock holding means is released, and the focus adjustment at that time is accompanied by the release. Control to operate the focus lock means so that the focus lock is performed again based on the information, and to operate the focus lock holding means again when the focus lock holding operation member is operated in a state where the release operation member is preliminarily operated. Means are further provided.

E. Function In the invention of claim 1, when the focus lock holding operation member is operated again after the release operation of the release operation member, the holding of the focus lock is released.

According to the second aspect of the present invention, when the focus lock holding operation member is operated again with the release operation member being preliminarily operated, the focus lock is released. With this release, the focus lock is performed again based on the focus adjustment information at that time, and when the focus lock holding operation member is turned on while the release operation member is being preliminarily operated, the focus lock is held again. Is done.

F. Embodiment -First Embodiment- A first embodiment of the present invention will be described with reference to FIGS.

In FIG. 2, a photometric circuit 2 and a distance measuring circuit 3 are connected to the CPU 1. The photometric circuit 2 is connected to a light receiving element 4 for receiving light from the subject 20.
Based on the detection signal, photometric information on the luminance of the subject 20 is calculated and input to the CPU 1. The distance measuring circuit 3 includes a projector 6 that emits light toward the subject 20 through the projection lens 5.
And a light receiving element 8 that receives reflected light from the subject 20 via the light receiving lens 7, and calculates distance measurement information (focus adjustment information) corresponding to the distance to the subject 20 based on a detection signal of the light receiving element 8. And input to CPU1.

The CPU 1 also includes a motor driving circuit 11 for the focusing motor 9 and the film winding / rewinding motor 10,
Exposure control circuit 12 and switches SW1 and SW2 that are turned on in conjunction with a pressing operation of a release button (release operating member) (not shown).
And are connected. The switch SW1 is turned on by a half-press operation (preliminary operation) of the release button, and the switch SW2 is turned on by a full-press operation (release operation).

The CPU 1 turns on the switch SW1 to turn on the photometric circuit 2 described above.
Then, the distance measuring circuit 3 is operated, and the distance measuring information from the distance measuring circuit 3 is stored in the storage area. That is, focus lock is performed. Next, when the switch SW2 is turned on, the amount of movement of the photographing lens is calculated based on the stored distance measurement information, and the photographing lens is driven to the focusing position by the focusing motor 9 via the motor drive circuit 11. Thereafter, an exposure control member such as an aperture and a shutter is driven through an exposure control circuit 12 to perform photographing, and the motor 10 winds the film one frame. When it is detected that the film has been wound up to the end when all frames have been shot, the CP
U1 rewinds the film by the motor 10.

Further, a display circuit 13 for turning on and off the LED 15 in the finder, a clock circuit 14, and switches SW3 to SW6 are connected to the CPU 1. The switch SW3 is a switch that is turned on in conjunction with operation of a focus lock holding button (not shown),
If the switch SW3 is turned on while the above-mentioned half-press switch SW1 is turned on, the CPU 1 turns on the LED via the display circuit 13.
15 flashes and the focus lock status is maintained. That is, even if the switch SW1 is turned off by releasing the half-press operation, or if the switch SW1 is turned on again by half-press operation thereafter, the focus lock state is maintained. As a result, even if the switch SW1 is turned on again, the distance measurement circuit 3 does not operate, and reading of the distance measurement information is not performed. This is called a focus lock holding mode. The LED 15 described above is illuminated and displayed when the normal distance measurement is completed.

The switch SW4 is a switch that is turned on in conjunction with the operation of a self-timer mode command button (not shown).
When 4 is turned on, the CPU 1 sets a self-timer mode, performs time measurement for a predetermined time by the time measurement circuit 14, performs shutter release after completion of the time measurement, and performs so-called self-timer shooting.

The switch SW5 is a switch interlocked with a film rewind operation button (not shown).
Performs rewinding of the film by the motor 10 via the motor drive circuit 11. The switch SW6 is a power switch that is linked to a taking lens barrier that is opened and closed on the front of the taking lens, and is turned on when the taking lens barrier is opened.

In the configuration of the above embodiment, the distance measuring circuit 3 uses the focus adjustment information detecting means 101, and the CPU 1 uses the focus lock means 103,
The focus lock holding means 105 and the release means 106 are respectively constituted.

Next, a control procedure performed in the CPU 1 will be described with reference to the flowchart of FIG.

When the half-press switch SW1 or the self-switch SW4 is turned on, this program is started. First, in step S1, distance measurement information from the distance measurement circuit 3 is read, and the distance measurement information is stored in a storage area. That is, focus lock is performed. Next, in step S2, a process of determining whether or not light emission of the electronic flash device is necessary based on the luminance of the subject 20 is performed.
Go to S3.

In step S3, it is determined whether or not the switch SW3 is turned on by operating the focus lock holding button. If affirmative, the process proceeds to step S4, where the focus lock holding flag is set.
Determine whether FLH is set. If a negative determination is made, the process proceeds to step S5, where it is determined whether the LED 15 in the finder is blinking. When step S5 is affirmed, the process proceeds to step S8, and when denied, the process proceeds to step S6. In step S6, the focus lock holding reset flag FL
Determine whether R is set. If an affirmative determination is made, the process proceeds to step S8. If a negative determination is made, the process proceeds to step S8, in which the LED 15 in the finder blinks in step S7.

On the other hand, if step S3 is negatively determined, step S25 is performed.
Then, it is determined whether or not the LED 15 in the finder is blinking. If step S25 is denied, the focus lock holding reset flag FLR is reset in step S26, the LED 15 is turned on in step S27, and the process proceeds to step S8.

When step S25 is affirmed, it is determined in step S28 whether the focus lock holding flag FLH is set. If step S28 is affirmed, the process proceeds to step S8, and if fixed, the focus lock holding flag F is set in step S29.
Set LH and proceed to step S8.

When step S4 is affirmed, the focus lock holding flag FLH is reset in step S21, and the LED 15 in the finder is switched from blinking to lighting. In step S22, the focus lock holding reset flag FLR is set, and the flow advances to step S23. In step S23, it is determined whether or not the half-press switch SW1 is on. If the result is negative, the process proceeds to step S8. If the result is affirmative, the process proceeds to step S24.
Read the distance measurement information from and store it in the storage area,
Thereafter, the process proceeds to step S8.

In step S8, it is determined whether or not the LED 15 is blinking. If the determination is affirmative, the process proceeds to step S9. If the determination is negative, the process proceeds to step S31. In step S31, the switch SW
It is determined whether 1 or SW3 is ON. If the determination is affirmative, the process proceeds to step S10. If the determination is negative, the focus lock holding flag FLH is reset in step S34 to end the process.

In step S9, it is determined whether or not the power switch SW6 linked to the opening and closing of the taking lens barrier is on. If a negative determination is made, the process proceeds to step S31, and if an affirmative determination is made, the process proceeds to step S10. In step S10, it is determined whether or not the switch SW5 is turned on by operation of the film rewind operation button.If an affirmative determination is made, the focus lock holding flag FLH is reset in step S32, and the LED 15 is turned off.
In step S33, the film is rewound by the motor 10 via the motor drive circuit 11, and then the process is terminated.

If step S10 is denied, the process proceeds to step S11, where it is determined whether the self-switch SW4 is on. When an affirmative determination is made, time measurement is started by the timer circuit 14 in step S35, and after a predetermined time has elapsed, it is determined in step S36 whether the LED 15 is blinking. If step S36 is affirmed, step S38
If the answer is no, new distance measurement information is read in step S37 and stored in the storage area, and then the flow proceeds to step S38. In step S38, the focus lock holding flag FLH is reset and the LED 15 is turned off.
Proceed to 14.

If the above step S11 is denied, the process proceeds to step S12, and it is determined whether or not the full-press switch SW2 is on. If a positive determination is made, the process proceeds to step S13, and if a negative determination is made, the process returns to step S3. In step S13, after resetting the focus lock holding flag FLH and turning off the LED 15, the photometric information from the photometric circuit 2 is read in step S14. Next, in step S15, the lens moving amount is calculated based on the distance measurement information stored in any of steps S1, S24, and S37, and the photographing lens is moved by the motor 9 via the motor driving circuit 11 based on the calculation result. Drive to the focusing position. Next, in step S16, an exposure value is calculated based on the luminance information read in step S14, and an exposure control member such as an aperture or a shutter is driven via the exposure control circuit 12 based on the calculation result to perform photographing. Thereafter, in step S17, winding of one frame of the film is started by the motor 10 via the motor drive circuit 11, and the process proceeds to step S18. In step S18, it is determined whether or not the film has been wound up to the end. If a negative determination is made, the process after winding is completed is terminated.
If 0, the film is rewound and the process is terminated.

According to the above procedure, the distance measurement information is stored in step S1 by turning on the switch SW1 in conjunction with the half-pressing operation of the release button, and the turning on of the switch SW3 by operating the focus lock holding button is determined in step S3. Then, after passing through steps S4 to S6, in step S7, the LED 15 in the finder
Flashes, and then passes through steps S8 to S12 to step S
Return to 3. At this time, if the switch SW3 is turned off and step S3 is denied, the process proceeds to steps S25, S28, S29, S8 to S12 and returns to step S3. Thereafter, if the switches SW2 and SW3 are not turned on, the process goes through a loop of steps S3, S25, S28, S8 to S12, and S3.

Since there is no determination of the state of the half-press switch SW1 in this loop, the focus lock is maintained even if the half-press operation of the release button is canceled or the half-press operation is performed again thereafter. That is, the focus lock state is maintained. Further, in this state, when the switch SW3 is turned on again by re-operating the focus lock holding button, the process exits the above loop and proceeds from step S3 to step S4,
In step S21, the focus lock holding flag FLH is reset, and the LED 15 is turned on and off.
To set the focus lock holding reset flag FLR. Thereafter, if the half-press switch SW1 is turned off, the process ends through steps S8, S9, S31, and S34. That is, when the switch SW3 is turned on while the focus lock is being held, the focus lock is released.

On the other hand, when the focus lock is held,
That is, if the release button is fully pressed during the above-described loop, step S12 is affirmed and step S12 is affirmed.
After the focus lock holding flag FLH is reset in 13, a series of photographing processes are performed in steps S14 to S17. At that time, focusing is performed based on the distance measurement information stored in step S1.

Further, when the self-timer button is operated during the above-mentioned loop, the switch SW4 is turned on and the step S4 is performed.
11 is affirmed, and a predetermined time is measured in step S35. Then, since step S36 is affirmed, step S36
37 is skipped, the focus lock holding flag FLH is reset in skip S38, and thereafter, step S14
The following shooting is performed. At this time, in step S15,
Focusing is performed based on the distance measurement information stored in step S1. That is, even during self-timer shooting, shooting can be performed in the focus adjustment state fixed in the focus lock holding mode, and for example, a dropout phenomenon during self-timer shooting can be prevented.

On the other hand, if step S11 is affirmative when the mode is not the focus lock holding mode, the distance measurement information is stored in step S37 after the end of the time measurement, and the photographing process from step S14 is performed at the lens position based on this distance information. Will be

Further, when the focus lock holding button is operated while the focus lock state is held and the release button is half-pressed, the processing exits the above-described loop and the step
Proceed from S3 to steps S4, S21 to S24, read and store new distance measurement information in step S24, and execute steps S8, S31, S10 to S1.
It goes around the loop of 2, S3, S25 to S27, S8, and if the focus lock holding operation member is operated at this time, the focus lock state is held again as described above.

Furthermore, if the power switch SW6 linked to opening and closing of the taking lens barrier is turned off in step S9, the process goes through step S31, resets the focus lock holding flag FLH in step S34, and ends. That is, the focus lock state is released. Also,
Also when it is determined that the rewinding step SW5 in step S10 is turned on, the state holding of the focus lock is released through steps S32 and S33.

Second Embodiment In the above description, the case where the focus lock is held by operating the focus lock holding button after the half-press operation is performed. Next, based on FIGS. 4 and 5, A second embodiment in which the focus lock holding operation button is operated before the release button is half-pressed will be described.

In FIG. 5, a liquid crystal display device 25 is connected to the display circuit 13 together with the LED 15, and displays whether or not the mode is the focus lock holding mode.

In FIG. 4, this program is started when the power switch SW6 linked to the taking lens barrier is turned on, and first, the tire is started in step S51. Next, in step S52, it is determined whether the power switch SW6 is on,
If a negative determination is made, the process is terminated, and if an affirmative determination is made, the process proceeds to step S53. In step S53, the half-press switch SW1
Is determined to be ON, and if a negative determination is made, step S54 is performed.
Then, it is determined whether or not the switch SW3 is on. Step S54
If the answer is NO, the process proceeds to step S55, and it is determined whether or not a predetermined time has elapsed after the start of the timer. If a negative determination is made, the process returns to step S52, and if a positive determination is made, the process is terminated.

When it is determined in step S54 that the focus lock holding switch SW3 is ON, the process proceeds to step S56, and it is determined whether the focus lock holding mode is set. If a negative determination is made, the focus lock holding mode is set in step S57, and the focus lock holding mode is displayed on the liquid crystal display device 25 in step S101, and the flow advances to step S59. If an affirmative determination is made in step S56, the normal mode in which the focus lock is not held is set in step S58, and the normal mode is displayed on the liquid crystal display device 25 in step S102, and the process proceeds to step S59. In step S59, it is determined whether or not the focus lock holding switch SW3 is on. If an affirmative determination is made, the process remains in step S59 until a negative determination is made. If a negative determination is made, the process returns to step S51.

Here, if it is determined in step S53 that the half-press switch 1 is on, in step S61, the distance measurement information is read and stored in the storage area, and in step S103, it is determined whether the mode is the focus lock holding mode. If step S103 is affirmed, the LED 15 in the finder blinks in step S104 and the process proceeds to step S62. If the result is negative, the LED 15 in the finder is turned on in step S105 and the process proceeds to step S62. In step S62, it is determined whether or not light emission of the electronic flash device is necessary, and then the process proceeds to step S63. In step S63, it is determined whether or not the full-press switch SW2 is on. If the result is negative, the process proceeds to step S64.

In step S64, it is determined whether or not the half-press switch SW1 is turned on. If the determination is affirmative, the process returns to step S63. If the determination is negative, the process proceeds to step S65. Step S65
Then, it is determined whether the power switch SW6 is on. If a negative determination is made, the processing is terminated.
In S66, it is determined whether the switch SW3 is on. Step S6
If affirmative, the process proceeds to step S56, and if negative, it is determined in step S67 whether or not the focus lock holding mode is set. When step S67 is affirmed, the process returns to step S63, and when denied, the process returns to step S51.

If it is determined in step S63 that the full-press switch SW2 is on, the finder LED 15 is turned off in step S106, and the flow advances to step S68. In step S68, the luminance information from the photometric circuit 2 is read, and the process proceeds to step S69.

In step S69, the lens movement amount is calculated based on the distance measurement information stored in step S61, and the photographing lens is driven to the focusing position by the motor 9 via the motor drive circuit 11 based on the calculation result. Then step
In S70, an exposure value is calculated based on the luminance information read in step S68, and an exposure control member such as an aperture shutter is driven via the exposure control circuit 12 based on the calculation result to perform photographing. Then, in step S71, the motor drive circuit 1
The film is wound up by one frame by the motor 10 via 1, and the flow advances to step S72. In step S72, the normal mode is set,
Next, in step S107, the normal mode display is performed on the liquid crystal display device 25.
And returns to step S51.

According to the above procedure, when the normal mode is already set, the switch by operating the focus lock holding button
If ON of SW3 is determined in step S54, step S56
In step S57, the focus lock holding mode is set, and in step S101, an indication to that effect is displayed. Thereafter, when the switch SW1 is turned on by half-pressing the release button, step S53 is affirmed, the distance measurement information is read and stored in step S61, and L is determined in step S104.
ED15 flashes. Thereafter, if the switch SW1 is turned off by releasing the half-press operation, and the switches SW2 and SW3 are not turned on and the switch SW6 is not turned off, the process proceeds to steps S63 to S67.
It will go around the loop of S63. Further, at this time, when the switch SW1 is turned on again by the half-press operation, step S64 is performed.
Returns to step S63 where is affirmed.

Therefore, the focus lock state is maintained even when the release button is half-pressed and the switch SW1 is turned off when the focus lock holding mode is set, and the reading and storage of the distance measurement information is not performed even if the release button is half-pressed again. I can't. Also, if the switch SW2 is turned on during the loop of steps S63 to S67 and S63 described above, the processing exits this loop, proceeds from step S63 to step S106, and performs a series of photographing processing in steps S68 to S71. . At this time, focusing is performed based on the distance measurement information read and stored in step S61. Then, step S1
At 07, the focus lock holding mode is released and the normal mode is set.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG.

The camera in this embodiment is capable of performing double self-timer shooting. That is, when the switch SW4 is turned on once by operating the self-timer shooting designation button, the single self-timer mode in which the self-timer shooting is performed once is set, and thereafter, when the switch SW4 is turned on once within a predetermined time, the double self-timer mode is set. The self-timer mode is set. When the double self-timer mode is set, the above-described self-timer shooting is performed twice consecutively.

FIG. 6 shows a processing procedure of the CPU 1 in the present embodiment. Steps similar to those in FIG. 3 are denoted by the same reference numerals, and only different points will be described.

In FIG. 6, if it is determined in step S11 that the switch SW4 is on, it is determined in step S205 whether or not the switch SW4 is still on. If affirmative, the process waits until the result is negative, and if negative, the process proceeds to step S206. . In step S206, the single self-timer mode is set, and then in step S207
To start a one-second timer, and then proceed to step S208.

In step S208, it is determined whether the switch SW4 is on or not. If the result is negative, the process proceeds to step S214. In step S214, it is determined whether or not the timer has counted one second. If negative, the process returns to step S208, and if positive, step S211.
Proceed to. If step S208 is affirmative, step
In S209, it is determined whether or not the switch SW4 is still on.
To specify the double self-timer mode and step S211
Proceed to.

In step S 211, the clock circuit 14 measures a predetermined time. After the timing is completed, the process proceeds to step S212, where LE
It is determined whether D15 is blinking. When step S212 is affirmed, the process proceeds to step S14, and when affirmed, in step S213, the distance measurement information from the distance measurement circuit 3 is read and stored, and the process proceeds to step S14.

When a series of photographing processes in steps S14 to S17 are completed, it is determined whether or not the film is at the end of the film in step S18. If this is not the case, after winding is completed, it is determined whether or not the double self-timer mode is set in step S220. I do. If a negative determination is made in step S220, the focus lock holding flag FLH is reset in step S225, and the LED 15
Is turned off to end the processing.

If step S220 is affirmative, step S221 counts a predetermined time by the timing circuit 14, and after completion of the timing, it is determined in step S222 whether the LED 15 is blinking. When step S222 is affirmed, the process proceeds to step S224, and when denied, in step S223, the distance measurement information from the distance measurement circuit 3 is read and stored, and the process proceeds to step S224. Step S224
Now, release the double self-timer mode and step
Return to S14.

According to the above procedure, when the self-timer button is operated once, the single self-timer mode is set in step S206. Thereafter, when the self-timer button is operated again until one second elapses, the double self-timer mode is set in step S210. Is set. When the double self-timer mode is set while the focus lock is held, the self-timer is set at the lens position based on the distance measurement information stored in step S1, that is, at the lens position based on the held focus lock. Shooting is performed twice consecutively. Needless to say, the self-timer shooting may be continuously performed three times or more.

In the above-described first to third embodiments, the focus lock holding button is separately provided. However, the focus lock holding mode is instructed by, for example, instructing the focus lock holding by continuously pressing the release button twice and half. The method does not matter.

Also, the distance measurement information from the distance measurement circuit 2 is stored by half-pressing the release button, and then the photographing lens is driven to the focusing position based on the distance measurement information stored by fully pressing the release button. Although the shutter release type camera is shown, the photographing lens is driven to the focusing position based on the distance measurement information from the distance measurement circuit 2 by pressing the release button halfway, and fixed at that position, and then the release button is pressed. The present invention can also be applied to a camera of a type that performs a shutter release in response to a full-press operation of.

Further, like a TTL automatic focusing device of a single-lens reflex camera, a camera that detects focus adjustment information indicating a shift amount and a direction between a subject imaging plane and a scheduled imaging plane instead of distance measurement information, The invention is equally applicable. In such a case, the photographing lens is driven to the focusing position by the focus adjustment information and fixed at that position to perform focus lock.

Furthermore, the camera that reads and stores the distance measurement information by half-pressing the release button has been described. For example, a touch sensor or the like can be used to read and store the distance measurement information by simply touching the release button. The present invention can be applied to a camera of the type described above.

G. Effects of the Invention According to the invention of claim 1, after the release operation of the release operation member, the focus lock holding operation is released when the focus lock holding operation member is turned on again, so that the focus lock can be easily released by the photographer's will. Can be released from the focus lock holding.

According to the second aspect of the present invention, when the focus lock holding operation member is again turned on while the release operation member is being preliminarily operated, the holding of the focus lock is released,
With the release, the focus lock is performed again based on the focus adjustment information at that time, and when the focus lock holding operation member is turned on while the release operation member is being preliminarily operated, the focus lock is held again. With this configuration, the operation for re-holding the focus lock, such as when the flying body moves, can be quickly performed, and the usability is good.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to claims. 2 and 3 show a first embodiment of the present invention, FIG. 2 is a block diagram of a camera operation control device according to the present invention, and FIG. 3 is a flowchart showing a processing procedure. FIG. 4 is a flowchart showing an example of the processing procedure of the second embodiment, and FIG. 5 is a block diagram showing the second embodiment. FIG. 6 is a flowchart of a processing procedure in the third embodiment of the present invention. 1: CPU, 3: Distance measuring circuit 101: Focus adjustment information detecting means 102: Release operation member 103: Focus lock means 104: Focus lock holding operation member 105: Focus lock holding means 106: Release means SW1-SW6: Switch

Continued on the front page (72) Inventor Tatsuo Amanuma 1-6-3 Nishioi, Shinagawa-ku, Tokyo, Japan Nikon Oi Works Co., Ltd. (72) Inventor Yoshiaki Otsubo 1-6-3, Nishioi, Shinagawa-ku, Tokyo, Japan Inside Nikon Oi Works (72) Inventor Akira Katayama 1-6-3 Nishioi, Shinagawa-ku, Tokyo Nikon Oi Works Co., Ltd. (56) References JP-A-61-130932 (JP, A) JP-A-57- 146225 (JP, A)

Claims (2)

(57) [Claims] A focus adjustment information detecting means for detecting focus adjustment information for focusing an imaging lens on a subject; and a preliminary operation of a release operation member prior to a release operation, based on the detected focus adjustment information. A focus lock means for performing focus lock by operating a focus lock holding operation member for instructing a focus lock holding mode; and actuating when the focus lock holding operation member is operated while the release operation member is being preliminarily operated;
Focus lock holding means for continuing the focus lock even if the preliminary operation of the release operation member is released or the preliminary operation is performed again thereafter; and the focus lock maintenance operation after the release operation of the release operation member. An operation control device for a camera, comprising: release means for releasing the operation of the focus lock holding means when the member is operated again. 2. A focus adjustment information detecting means for detecting focus adjustment information for focusing a photographing lens on a subject, and based on the focus adjustment information detected by a preliminary operation of a release operation member prior to a release operation. A focus lock means for performing focus lock by operating a focus lock holding operation member for instructing a focus lock holding mode; and actuating when the focus lock holding operation member is operated while the release operation member is being preliminarily operated;
Focus lock holding means for maintaining the focus lock even if the preliminary operation of the release operation member is released or the preliminary operation is performed again thereafter; and When the lock holding operation member is turned on again, the operation of the focus lock holding means is released, and with the release, the focus lock means is operated so that the focus lock is performed again based on the focus adjustment information at that time. And control means for operating the focus lock holding means again when the focus lock holding operation member is turned on while the release operation member is being preliminarily operated. apparatus.