JP2720151B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a state where a plurality of objects are focused together.
Camera with a shooting mode for
You. (Background of the Invention) Conventionally, each subject is photographed for a plurality of subjects at different positions.
As a way to shoot with your body in focus
With the camera in the narrowed state, check the state of each subject.
Aperture that covers each subject with field brightness
Was decided. For this reason, shooting under the above circumstances depends on the experience of the photographer, etc.
Is affected by the problem, unsuitable for amateurs, and
Probability was high. (Object of the Invention) The object of the present invention is to combine the first object and the second object.
In the shooting mode to bring the camera into focus,
For each of the first and second objects to be focused
These two while visually recognizing the actual focus state.
Shooting optics to a position where both objects are in focus
The system can be moved, and
Photographing is performed by mistake before moving the optical system
To provide a camera that can prevent inconveniences
And (Features of the Invention) In order to achieve the above object, the present invention
Focus detection circuit to detect the focus state
And a driving circuit for driving the first pair.
Make sure that both the elephant and the second object are in focus
A shooting mode is provided for the first pair in the shooting mode.
Focus state detected by the focus detection circuit for the elephant
The imaging optical system is driven by the drive circuit based on
The first object to be in focus on the first object
To the position, and the imaging optical system stops at the first position.
The focus detection circuit detects the second
The photographing optical system based on the focus state of the object
Drive by the drive circuit and focus on the second object
To the second position where
To bring both the second object and the second object into focus
Forward to a third position internally dividing the first position and the second position
A control circuit for driving the photographing optical system by the driving circuit is provided.
The first and second objects are in focus.
And in the shooting mode, the control circuit
More at least the imaging optical system moves to the second position
Between the start of the operation and the movement to the third position.
Prohibition means for prohibiting the start of the shooting operation by operating the work member
Is provided. (Embodiment of the Invention) FIG. 1A shows a basic configuration of an embodiment of the present invention.
FIG. 1B is a block diagram showing the sequential processing.
FIG. The depth mode selection means 1 performs depth-of-field priority shooting (hereinafter referred to as depth-of-field shooting).
Is a means of selecting a mode (depth is simply referred to as depth).
Push mode allows you to shoot multiple subjects at different distances together.
This is selected when you want to take a picture with an event. After selecting the depth mode, the photographer
Select the body a as the distance measurement target, and set the first shutter button (not shown).
According to the stroke, the photometric switch sw1 (the operating means of the present invention)
Is turned on, and the first depth operation is performed.
As a result, the calculating means 2 informs the distance measuring means 3 of the near-point-side subject.
a) to obtain the in-focus position, and
Step 4 moves the taking lens of the camera to the in-focus position.
You. Then, the lens position is stored in the lens position storage unit 5.
It is stored in the counter means 6 to indicate that the depth is the first time.
Remember. The photographer turns off the photometry switch sw1 once,
Select the side subject b as the distance measurement target and turn the photometry switch sw1 again.
By turning it on, the second depth operation is performed. This
As a result, the calculating means 2 informs the distance measuring means 3 of the far-point object b.
To obtain the amount of defocus on the image plane,
The depth is stored in the focus amount storage means 7 for the second time.
This is stored in the counter means 6. The photographer turns off the photometry switch sw1 once,
Put the side subject a and the far point side subject b in the shooting screen,
Depth 3 times by turning on the photometric switch sw1
Perform eye operations. As a result, the calculating means 2
The defocus amount stored in the waste amount storage means 7 is read.
Lens movement distance corresponding to this defocus amount
By dividing by a predetermined rate, for example, 7:10
Position c, and moves the lens to the intermediate position c by lens driving means.
4 to move. At the same time, 7/17 of the defocus amount
(The defocus amount at the intermediate position c) is reduced to the minimum circle of confusion 35
By dividing by μm, the near object a and the far object
The aperture that both the subject b falls within the depth of field is calculated.
Display in column 8. Also, make sure that this is the third depth.
It is stored in the counter means 6. The above three photometric switches sw
The aperture determination operation based on depth is completed by the operation in step 1.
You. In addition, in FIG. 1 (A), depth 1 to 3 times
It represents the action according to the eyes. The calculating means 2 measures the depth by the photometric means 9 at each depth.
The light value may be captured, or the light measurement value may be obtained only at the third depth.
You may take in. Calculation means 2 performs photometry at the third depth
Shutter time from the photometric information from the means 9 and the calculated aperture
The time is calculated, and the shutter time is displayed by the display means 8 together with the aperture.
Display. If the photographer is at the same time as the third
When the closing switch sw2 is turned on, the calculating means 2
And the shutter time are output to the exposure control means 10, and the exposure operation is
Let it do. Thereby, the near point side subject a and the far point side subject
b and all subjects between them are in focus
Photos can be taken. According to the present embodiment, the subject closer to the near point than the defocus amount is
a and the far point object b both fall within the depth of field.
Because the calculation is performed, the focus is adjusted for multiple subjects.
The aperture that guarantees the correct condition can be determined automatically.
Wear. Also, the near point side subject a and the far point side subject b and the
The sequential processing for the intermediate position c
Switch sw1 to 1 to 3 times
Can make the operation easier for the photographer to understand.
You. In FIG. 1, the lens is not driven at the second depth.
However, the lens may be driven even at the second depth.
No. In this case, both the first and second depth
The photographer should make sure that the camera is in focus.
And the operation becomes easier to understand. Measures the distance of the far-side object b at the first depth and twice at the depth
Needless to say, the distance of the near point object a may be measured with eyes.
Absent. Predetermined rate for internally dividing defocus amount is limited to 7:10
For example, 1: 1 may be used. Also, when calculating the aperture,
The defocus amount at the intermediate position c is divided by the minimum circle of confusion.
But the defocus amount is converted to an aperture using a table
You may do so. In FIG. 1, a shutter button is used as the operating means of the present invention.
Switch SW1 that is turned on by the first stroke of
Although it is used, even if using a separately provided photometric switch
Alternatively, operation means dedicated to depth may be provided. FIG. 2 shows a specific configuration of the embodiment shown in FIG. SPC is a light receiving element for TTL open metering, and DI is a logarithmic compression
Iode and AMP1 are operational amplifiers, which constitute photometric means.
And outputs the open luminance Bvo (apex value). VR1 is
Output film sensitivity Sv with variable resistor for film sensitivity setting
I do. VR2 sets the open aperture Avo of the attached lens
VR3 is a variable resistor for setting the open aperture.
Minimum aperture to set small aperture Av1 (minimum aperture on aperture side)
Variable resistor for setting, ADD is Bvo + Sv + Avo = Bv + Sv = Ev
Adder for calculating, AD1 and AD2 are A / D conversion circuit, DA1 is microphone
Aperture Av output from PH port of computer COM
D / A conversion circuit to convert to analog voltage, AMP2 is the number of aperture stages
△ Av = Av−Avo subtractor, DRAV is for aperture control
With start magnet MG1 and stop magnet MG2
The aperture control circuit controls the aperture based on the number of aperture steps △ Av.
Path, EXP is output from PJ port of microcomputer COM
Time extension time to extend the shutter time Tv
Road, DRTV use the first curtain magnet MG3 and the second curtain magnet MG4
Shutter time output from the real-time expansion circuit EXP
Control that controls the travel of the front curtain and rear curtain based on the
Circuit, DISP is calculated aperture and shutter time and depth
Display for first and second display, COM is PA port to P
This is a microcomputer having a P port. swAF sets the AF mode to servo mode or one-shot mode
AF mode selection switch to select one of
The average of the first and second depths of the photometric value Ev in the depth mode
Photometric value to select either the value or the latest value of the third depth
Select switch, swDEP is depth mode or normal mode
Depth mode selection switch, sw1
Is measured by the first stroke of the shutter button.
Optical switch, sw2 is the second stroke of the shutter button
The release switch that turns on more, swCHG is fully charged
On when the shutter is turned off and off when the shutter travel is completed.
Switch and MT1 are charging mechanisms such as shutters and fill
DR1 is a charge motor that drives the
Motor drive circuit that energizes the dimotor MT1, AFS shooting
AF sensor that receives the subject image incident through lens L1
AFD focuses on the image plane based on the signal from the AF sensor AFS.
A focus detection circuit that calculates the defocus amount d to the position
is there. The above-described elements except the taking lens L1 are provided on the camera side.
Each element described below is attached to the camera.
Located on the lens side, communication control between the camera and lens
Information communication is performed via the roller CC. BR1 is a bracket linked to the movement of the lens
COD1 cooperates with the brush BR1 to move the lens L1
(ENC1) is a code pattern plate that detects (distance ring position)
Lens position to encode the lens position into a digital signal.
Encoder and BR2 linked to focal length change due to zooming
COD2 works with brush BR2 to reduce the focal length.
ENC2 code pattern plate to detect
This is a zoom encoder that encodes a digital signal. CM is a communication port from the microcomputer COM's PP port.
Lens driving amount signal input through the controller
Controls the motor drive circuit DR2 according to the lens drive direction signal.
And the displacement pulse counter CNT is in the up mode or
Is the motor control circuit that determines the down mode, MT2 is the motor control circuit.
Lens drive circuit DR2 to pass in the direction corresponding to the lens drive direction.
A lens that is electrically charged and moves the taking lens L1 in the optical axis direction.
The drive motor and LP1 are interlocked with the movement of the taking lens L1.
Tooth pattern, LP2 touches comb tooth pattern LP1,
A contact that sends a displacement pulse for each unit length movement of the shadow lens L1
One side, CNT is lens drive input from communication controller CC
Displacement signal set by the quantity signal and input from the contact piece LP2.
Count, and when the count value matches the set value,
Command motor control circuit CM to stop lens drive motor MT2
This is a displacement pulse counter. Next, the operation of the microcomputer COM is shown in FIG.
This will be described with reference to the flowchart of FIG. [Step 1] When the power supply (not shown) is turned on, the power
-Up clear is performed. [Step 2] Depth number of times (photometry switch sw1
N register indicating the number of times of depression, aperture determination by depth
K register, one shot, indicating whether operation is completed
Indicates whether or not ranging and lens driving in mode have been completed
Reset the a registers to 0, respectively. [Step 3] Various modes are selected by the photographer
You. Now, the depth is selected by the depth mode selection switch swDEP.
Mode is selected and the first subject is
It is assumed that the optical switch sw1 is turned on for the first time. [Step 4] The state of the photometric switch sw1 is detected, and
So, the process proceeds to step 5. [Step 5] Start the timer. This timer
Sets the aperture determined by the depth to the
Clocking a predetermined time (for example, 8 seconds) to hold after turning off
It is. [Step 6] The photometry switch sw1 is turned on
Is set to 1. [Step 7] From the flash unit attached to the camera
Checks whether the charge completion signal is input to the PD port.
If not, the process proceeds to step 8. Enter
If this is the case, the process branches to step 9;
Will be described later. [Step 8] Determine whether or not it is in depth mode
You. Now that it is in depth mode, go to step 10.
move on. [Step 10] Determining how many times the depth is
Since this is the first depth, the process proceeds to step 11. [Step 11] lens drive in depth mode
An m register indicating whether or not this is the case is determined. Still driving the lens
No, the process proceeds to step 12. [Step 12] Operate the focus detection circuit AFD, and
Of the first subject incident on the AF sensor AFS via the lens L1
The defocus amount d of the image is taken in through the PN port. [Step 13] Defocus amount obtained in step 12
The lens driving amount and the lens driving direction are calculated from d.
Output from the PP port. This allows displacement pulse power
In the counter CNT, the lens drive amount is set and the lens drive
Up mode or down mode is set according to the direction.
It is. The motor control circuit CM switches the lens according to the lens drive direction.
The forward and reverse rotation directions of the motor drive motor MT2 are determined. Also,
The motor control circuit CM operates the motor drive circuit DR2 and
Lens L1 is moved in the optical axis direction by the lens drive motor MT2
Let it. This movement in the optical axis direction is similar to the comb-shaped pattern LP1.
It is converted to a displacement pulse by the contact piece LP2, and the displacement pulse
It is counted by the counter CNT. This count is set
If it matches the lens drive amount, the displacement pulse counter CNT
The match signal is output to the motor control circuit CM,
The motor control circuit CM uses the motor drive circuit DR2 to drive the lens.
The driving of the dynamic motor MT2 is stopped. Shooting with the above operation
Lens L1 moves by the amount of lens drive and reaches the in-focus position
You. [Step 14] 1 is stored in the m register. m = 1
This means that lens driving has already been performed. [Step 15] Whether n register is 0
(The first depth). Now, once in depth
Because it is an eye, go to step 16. [Step 16] First Depth Lens Position (Distance Ring Position)
To the built-in memory of the microcomputer COM
You. [Step 17] The photometric value Ev output from the A / D conversion circuit AD1
Through the PF port. [Step 18] The photometric value acquired in step 17 is converted to Ev0
And stored in the built-in memory. [Step 19] Determine whether the mode is the depth mode. [Step 20] Zooming of aperture Avdep by depth
Correction according to the change of the focal length due to
But now it's the first depth, the aperture Avdep is still determined
Because there is no, pass as it is. [Step 21] Reducing aperture Avdep by depth
Comparison with the minimum aperture Avl
At the first time, the aperture Avdep has not been determined yet,
Pass as it is. [Step 22] Aperture Avdep with depth is narrowed down
If the aperture is further narrower than the minimum aperture Avl
The indicator DISP flashes and a warning is displayed.
Pass as it is. [Step 23] Whether the K register is 1 (depth depends on depth)
To determine whether the aperture stop Avdep has been determined). now
Since it has not been determined yet, go to step 24. [Step 24] Charge completion signal input from strobe device
Detect whether or not. I haven't entered it now
Then, go to step 25. [Step 25] The depth mode is determined. [Step 26] Determine whether it is the first depth (n = 0) or not.
Separate. Now that it is the first depth, proceed to step 27
No. [Step 27] Display the first depth on the display DISP
Let me know. [Step 28] The photometry switch sw1 is kept on
If so, go back to step 3 and go through steps 3-8,10,
That the m register is 1 in step 11,
Advances to step 29 because
No. [Step 29] Metering value Ev output from A / D conversion circuit AD1
Through the PF port. [Step 30] Ev1 the photometric value acquired in step 29
And stored in the built-in memory. Then steps 19-28
Return to step 3 again through
Repeat the above routine as long as it is turned on. Photometry
When switch sw1 is turned off, steps 28 to 31
Branch to [Step 31] SW1 is off
Returns to step 3 if the timer has not expired.
Step 4 branches to step 32. [Step 32] One register is determined. In Step 6
Since 1 = 1, the process proceeds to step 33. [Step 33] Reset m and 1 registers to 0
Cut. [Step 34] Increment n register 1. This
The n register becomes 1, and the next time is the second depth.
Represent. When the second subject is the distance measurement target and the photometry switch sw1 is set to 2
When the switch is turned on for the first time, the second operation of the depth is started.
You. Until step 14, proceed in the same way as for the first depth
In step 12, the distance of the second object is measured.
The photographing lens L1 is moved to the focal position. Step 15
Since the second pass (n = 1), the process proceeds to step 35. [Step 35] Depth detected by the second distance measurement
Focus amount d and then from zoom encoder ENC2
The input focal length is stored in the built-in memory. After this,
The photometry is performed at steps 29 and 30, and the photometry value Ev1 is updated. Also,
From step 26, the process proceeds to step 36. [Step 36] It is determined whether or not the depth is the second time.
Since the depth is the second time, the process proceeds to step 37. [Step 37] Display the second depth on the display DISP
Let me know. When the photometry switch sw1 is turned off, the
Reset m register and 1 register to 0 by routine
And set the n register to 2 for the third time
Wait for on. Put the first and second subjects in the shooting screen, and
When switch sw1 is turned on for the third time, the third depth
Start operation. The first and second depths until Step 8
Proceed in the same way as the eyes, and branch to step 38 in step 10.
You. [Step 38] Determine the K register. Still in depth
K = 0 since the aperture stop Avdep is not determined
From step 39. [Step 39] Record in step 16 in the first depth
Reads out the stored lens position and focuses on the second depth
Is calculated as the difference X from the current lens position. [Step 40] X = 0, that is, the focus position of the first depth
If the focus position is the same as the depth second focus position,
The depth of the value, so it depends on the depth
No need to determine aperture, jump to step 48
You. If X = 0, go to step 41. [Step 41] Distance measurement of the far-point object at the first depth
However, when the distance of the near point object is measured at the second depth,
Since the difference X becomes positive, proceed to step 42 and perform the first depth
To measure the distance to the near-point object, and to the far-point object at the second depth
When the distance X is measured, the difference X becomes negative.
Proceed to. [Step 42] Current lens position by calculation of X × 7/17
Lens movement amount from the position to the intermediate position c (FIG. 1 (B))
And the lens driving direction. [Step 43] Current lens by calculation of X × 10/17
Lens movement amount and lens drive from position to intermediate position c
Calculate the direction. [Step 44] lens drive calculated in steps 42 and 43
Output the amount and lens driving direction from the PP port, and
Drive the drive motor MT2 to move the taking lens L1 to the intermediate position c.
Move to [Step 45] Defocus amount stored in step 35
d is read out, and the aperture Avdep based on the depth is calculated by the following equation: Avdep = d × (7/17) ÷ 35 μm. [Step 46] Import photometric values. [Step 47] Ev2 the photometric value captured in step 46
And stored in the built-in memory. [Step 48] Defining aperture Avdep by depth is completed
Therefore, 1 is stored in the K register. Squeezing by depth
When zooming is performed after the decision of Avdep
Changes the depth of field due to the change in focal length,
The aperture Avdep must also be changed. So, step 2
Focal length memorized in step 35 by zooming at 0
When detecting that the focal length has changed from the second focal length,
Avdep x (current focal length) ² ÷ (2nd depth focus
distance) ² The aperture Avdep is corrected by the following equation. Aperture Avdep
Is smaller than the minimum aperture Avl on the aperture side
Warning display by flashing of the display DISP in step 22
U. In step 23, the depth is now determined by the depth Avdep
Since the operation is completed and K = 1, the process proceeds to step 49. [Step 49] Determine whether the release switch sw2 is on or off.
Separate. Now the release switch sw2 is off
Then proceed to step 36, from which
Proceed to step 50. [Step 50] The metering value selection switch swEV is set to the average value and the maximum value.
It is determined which of the new values has been selected. [Step 51] When the latest value is selected for the photometric value
Is the latest value Ev2 measured in step 46 of the third depth
Store in v register. By using the latest value,
Exposure that matches the composition at the time can be obtained. [Step 52] When the average value is selected for the photometric value
Is the average of the first and second depth photometric values = (Ev0 + E
v1) / 2 is stored in the Ev register. To use the average
There is a difference in the exposure between the near point subject and the far point subject
Exposure, for example, for black and white subjects
Loss can be reduced. [Step 53] Depth aperture Avdep is set to Av register
To be stored. [Step 54] The shutter speed Tv is calculated from the equation of Tv = Ev−Av.
calculate. [Step 55] Display based on Apex value Av, Tv
Aperture is set to the shutter speed in seconds using the F-number unit.
Is displayed in units of. While the operation of determining the aperture Avdep by the depth is not completed
Is K = 0, so the release switch sw2 is turned on
Jumps from step 23 to step 49
You will proceed to Step 24. As a result, the third depth
Up to this point, the shutter release operation is prohibited. Depth 3
After the first time, K = 1, so the release switch sw2
If on, go from step 49 to step 56
No. [Step 56] Set the timer started in step 5 to
Forcibly terminate even before the timer time elapses. [Step 57] The input of the charge completion signal is determined. now,
If there is no input, the process proceeds to step 58. [Steps 58-64] Similar to steps 25 and 50-55,
Aperture Avdep where the first and second subjects are both within the depth of field
Calculate and calculate the shutter speed Tv based on it, and display it.
Display on the DISP. [Step 65] Aperture from the PH port to the D / A conversion circuit DA1
Is output. As a result, the subtractor AMP2 reduces the number of aperture steps to △ Av.
The corresponding voltage is input to the aperture control circuit DRAV. [Step 66] Switch from the PJ port to the real-time expansion circuit EXP.
Outputs the shutter time Tv. [Step 67] Sequence sub-blue shown in FIG.
Chin is called. [Step 68] Control the trigger signal from the PI port
Circuit DRAV and the shutter control circuit DRTV.
Start the work. The aperture control circuit DRAV is a start magnet
By actuating the MG1
Driving, and by the aperture regulating member only the number of aperture steps △ Av
Activate stop magnet MG2 when narrowing down is performed
Then, the drive of the aperture regulating member is stopped. This allows
The aperture is controlled to a value corresponding to Avdep. After this,
The shutter control circuit DRTV operates the front curtain magnet MG3,
Start running the front curtain. Real-time extension times by running the first curtain
Road EXP started timing operation and extended shutter speed Tv
When the time is counted, a signal is sent to the shutter control circuit DRTV.
Activate the rear curtain magnet MG4 to run the rear curtain
You. This completes the exposure operation. [Step 69] Charge switch when rear curtain drive completes
Since swCHG is turned off, this is determined. [Step 70] Charge motor is controlled by motor drive circuit DR1.
Energize the motor MT1 to charge the shutter, aperture, etc.
And feed the film. [Step 71] Determine whether the charge switch swCHG is on.
Thus, the completion of the charging operation is detected. [Step 72] The charge drive mode is set by the motor drive circuit DR1.
Power supply to the motor MT1 is stopped. After this, go to step 28
Return. When performing continuous shooting in depth mode, the first release
After performing the operation, when returning to step 28, the photometry
Switch sw1 and release switch sw2 are continuously turned on.
Return to step 3 from step 28
Do not return to step 2. Therefore, n = 2 and K = 1 hold
Jumps from step 38 to step 19,
During shutter release Avdep and metering values Ev0, Ev1, Ev2 during continuous shooting
Will be retained. In addition, not only for continuous shooting,
After the photometry switch sw1 has been turned on
Also returns to step 3 from step 28, so when releasing
Of the aperture Avdep and the photometric values Ev0, Ev1, Ev2. Change
Then, turn on the photometry switch sw1 for a while and then release
In this case, steps 28 and
And return to step 3 from step 31.
The aperture Avdep and the photometric values Ev0, Ev1, Ev2 are held. this
Must be turned on three times in the depth mode.
In other words, it takes time to prepare for shooting.
I want to make Avdep available as much as possible
is there. Turn off the photometric switch sw1 and set the timer
Has elapsed, or immediately after the release operation
If switch sw1 is turned off,
Returning to Step 2, n = 0, K = 0, and the aperture during release
Avdep and photometric values Ev0, Ev1, Ev2 are used for subsequent photography.
Not. During depth operation, the main flash device attached to the camera
When charging of the capacitor is completed, the charge completion signal is
When inputting to the PD port of the computer COM,
Branch from step 7 to step 9, n register and K register
Depth operation is stopped because the
It will be. This is flash photography, the first and second
To a certain distance (do not want to use depth mode)
Distance), a proper exposure for both
This is because it often does not. In this case normal
Mode, and go from step 9 to step 73.
No. [Step 73] Get photometric value Ev from A / D conversion circuit AD1
No. [Step 74] Selection state of AF mode selection switch swAF
Is determined. [Step 75] When servo mode is selected
Always measures the distance to the subject. [Step 76] If the subject moves according to the distance measurement result,
Following this, the lens is always moved to the in-focus position. [Step 77] One-shot mode is selected
In this case, the a register is determined. a = 1 is focus position once
Indicates that the lens has been moved to the position. In that case,
The process proceeds to step 49 without driving the distance and driving the lens. [Steps 78 and 79] Measure the distance to the subject and move to the in-focus position.
Move. [Step 80] 1 is stored in the a register. In Step 49, ON / OFF of the release switch sw2 is determined.
If it is off, input the charge completion signal in step 24.
If it is determined that there is an input, the process proceeds to step 81. [Step 81] Reset n register and K register to 0
And go to step 82 of routine not in depth mode.
No. [Step 82] Depending on the selected AE mode,
The aperture Av and shutter speed Tv are calculated from the photometric value Ev
The calculated value is displayed on the display DISP in step 55. In step 49, it is determined whether the release switch sw2 is on.
Then, the process proceeds to steps 56 and 57. Charge completion signal in step 57
Is determined, and if there is an input, the process proceeds to step 83. [Step 83] Reset n register and K register to 0
And go to step 84 of routine not in depth mode.
No. [Step 84] Select a step according to the selected AE mode.
The aperture Av and shutter speed Tv are calculated from the photometric value Ev
calculate. Hereinafter, in steps 64-67, the display operation and release
Operation. When depth mode is selected,
Limit the first and second lens drive to once each
I have. Therefore, in depth mode, AF mode is one-shot.
The default mode is automatically selected. (Effect of the Invention) As described above, according to the present invention, the first object
To bring both the second object and the second object into focus
In shooting mode, focus on the first object first.
Move the imaging optics to the first position where
And then bring the second object into focus.
To the second position, and then move the first and second objects
Shoot at the third position to keep both in focus
Since the optical system is driven, the focus target
Actual focus for each of the first and second objects
While visually checking the alignment, these two objects
Moving the shooting optical system to a position where both are in focus
Becomes possible. Also, in this shooting mode, the shooting optics
The release button is pressed before the system drive operation is completed.
The camera is configured not to start shooting.
The photographing was performed incorrectly before the movement of the photographing optical system was completed.
Inconvenience can be prevented. That is, the shooting of the present invention
Optical system drive control focuses on the first object.
And then focus on the second object and
Requires driving of three photographing optical systems for driving to the third position
The lens to the focus position for the second object.
Mistakenly controlling the lens drive to the third position or the lens drive to the third position
The release button is pressed and shooting starts
And then again put the two objects in focus
When photographing, the above three photographing optical system drive
It is necessary to make it work, and it is very poor operability.
You. In view of such improvement in operability, the above-described shooting of the present invention
The forbidden configuration is of significant significance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (A) is a block diagram showing a basic configuration of one embodiment of the present invention, FIG. 1 (B) is a diagram showing sequential processing of one embodiment of the present invention, FIG. FIG. 2 is a block diagram showing a specific configuration of one embodiment of the present invention, and FIGS. 3 and 4 are flowcharts showing the operation of the microcomputer shown in FIG. 1 ... depth mode selection means, 2 ... calculation means, 3 ...
Distance measuring means, 4 ... Lens driving means, 5 ... Lens position storing means, 6 ... Counter means, 7 ... Defocus amount storing means, 8 ... Display means, sw1 ... Photometric switch, sw2 ...
... release switch, a ... near point object, b ... far point object, c ... intermediate position, swDEP ... depth mode selection switch, COM ... microcomputer.

Claims (1)

(57) [Claims] In a camera having a focus detection circuit that detects a focus state of an object and a drive circuit that drives an imaging optical system, the first object and the second object are both brought into focus. A driving mode of the photographing optical system based on a focus state detected by the focus detection circuit with respect to a first object in the photographing mode. A second object detected by the focus detection circuit in a state where the imaging optical system is stopped at the first position where the object is in focus, The photographing optical system is driven by the drive circuit based on the focus state on the object, and is shifted to a second position where the second object is brought into focus, and then the first and second positions are set. The aforementioned method for bringing the object into focus together A control circuit for driving the photographing optical system by the driving circuit is provided at a third position that internally divides the first position and the second position, so that both the first and second objects are in focus. At the same time, in the shooting mode, the control circuit operates the operation member at least from the start of the movement of the shooting optical system to the second position to the movement of the operation member to the third position. A camera comprising a prohibition unit for prohibiting the start of a photographing operation.