JP2562197B2 - Camera control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a camera control device incorporating an autofocus mechanism.

[Conventional technology]

Recent compact cameras have a built-in autofocus device, which makes it possible to obtain clear photographic images without the need for troublesome focusing operations. There are various types of autofocus devices, but basically, a distance measuring means for detecting distance measuring data corresponding to a subject distance and a lens for setting a photographing lens at a position corresponding to the distance measuring data. It consists of transportation means.

A so-called program shutter that also serves as a diaphragm is used in such a popular compact camera, and the shutter blades are opened and closed so as to obtain the maximum aperture diameter suitable for the brightness of the subject. Further, a recent compact camera is generally one with a built-in strobe, and a so-called low-luminance automatic light emission control for automatically causing the strobe to emit light when the subject brightness is low is also known. On the other hand, select the strobe off mode to forcibly turn off the strobe so that you can shoot in situations where it is not desirable to fire the strobe or even when the brightness is low and you do not intentionally use the strobe. On the contrary, it is desirable to be able to select the strobe-on mode in which the strobe is actively fired for daytime synchronized photography.

[Problems to be Solved by the Invention]

However, in the program shutter, as the subject brightness decreases, the maximum aperture diameter of the shutter increases, and the depth of field decreases. Therefore, when the photographing lens is positioned by the autofocus device, a necessary depth of field cannot be obtained, and it becomes difficult to focus on the main subject. In particular, in the case where the lens set position by the autofocus device is set in stages, there is a drawback that the main subject is easily focused when the depth of field becomes too narrow. These drawbacks become prominent when shooting is performed without using a flash although the subject brightness is low.

[Object of the Invention]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide a camera control device capable of achieving a sufficiently satisfactory focus by an autofocus device even when the subject brightness becomes low.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a distance measuring unit that outputs distance measuring data corresponding to a subject distance, a photometering unit that outputs subject luminance data, and a combination of the distance measuring data and luminance data. Either a data table in which shooting lens set position data is associated, a strobe auto mode in which a strobe automatically fires when shooting a low-brightness subject, or a strobe-off mode in which strobe firing is prohibited regardless of subject brightness And a strobe mode setting means for selecting whether or not the aperture size data for determining the maximum aperture size of the program shutter at the time of photographing corresponding to the brightness data, the distance measurement data and the brightness data. Depending on the combination, the aperture value data when performing aperture priority shooting is stored, and the flash mode setting means When the strobe off mode is selected, the aperture priority shooting is automatically selected according to the combination of the distance measurement data and the brightness data based on the data table, and the aperture value prioritized to the aperture diameter data is selected. The maximum aperture diameter of the program shutter is regulated by data so that photographing is performed.

According to the above, not only the distance measurement data but also the brightness data of the subject correlated with the maximum aperture diameter of the program shutter can be taken into consideration to determine the set position of the photographing lens, and particularly the strobe off mode is selected. When shooting, the aperture priority shooting is automatically performed based on the aperture value data stored in the data table according to the combination of the distance measurement data and the brightness data, and the low brightness subject is captured. On the other hand, it is possible to perform shooting with a small aperture diameter and a deep depth of field.

An embodiment of the present invention will be described below with reference to the drawings.

〔Example〕

FIG. 2 shows an outline of an active type distance measuring system. The light transmitting section 2 includes a discharge tube 3 and a discharge tube 3 which emit near infrared light.
It comprises a slit plate 4 for shaping the light from the light into a slit and a light projecting lens 5. The light receiving section 7 is composed of a light receiving lens 8 and a light receiving sensor 9. The optical axes 5a and 8a of the light receiving lens 8 of the light projecting lens 5 are parallel to the optical axis 10a of the taking lens 10, and are separated by a base line length L. As will be described later in detail, the light receiving sensor 9 is formed by arranging minute light receiving elements S1 to S6 having a horizontally long rectangle in the base line length L direction.

When a part of the light is reflected by the short-distance subject 12 when slit light is emitted from the light projecting unit 2 toward the subject, the reflected light 12a enters the light receiving element S3 through the light receiving lens 8. When part of the slit light is reflected from the medium-distance subject 13 or the long-distance subject 14, the reflected lights 13a and 14a respectively enter the light receiving elements S2 and S1. Therefore, the object distance can be obtained by detecting which of the light receiving elements of the light receiving sensor 9 the reflected light from the object has entered.

If slit light is used as the light beam for distance measurement in this way, the light beam for distance measurement will be emitted even when the main subject is removed from the center of the shooting screen. Although it becomes unnecessary to perform the troublesome operation of re-framing after the aiming operation and the distance measurement in, the distance measurement can be performed by projecting spot light instead of slit light.

FIG. 3 shows the set positions of the photographing lens 10 corresponding to the object distance range. The lens set positions N _{0 to} N
₉ has the object distance l _{0 to} l ₉ as the optimum focusing distance,
When the diameter φ of the circle of confusion that can be regarded as in-focus is 0.025 mm, for example, when considering the depth of field of the taking lens 10, the
It is possible to continuously focus on a subject distance range from l ₀ to infinity.

It is used together with the distance measuring discharge tube 3, the light receiving sensor 9 and the circuit shown in FIG. The operation of the discharge tube 3 for distance measurement is controlled by the strobe drive circuit 18 together with the discharge tube 17 for illuminating the subject at the time of shooting. The light receiving elements S1 to S6 forming the light receiving sensor 9 are connected to the signal processing circuit 20, and the photoelectric output from each of the light receiving elements S1 to S6 is converted into a signal by the signal processing circuit 20. An AF control circuit 21 is connected to the signal processing circuit 20, and the AF control circuit 21 converts the signal output from the signal processing circuit 20 into distance measurement data and inputs it to the microcomputer 22. The AF control circuit 21 will be described in detail later.
Outputs a signal for lighting the discharge tube 3 at an appropriate timing.

The microcomputer 22 includes the strobe drive circuit.
18, In addition to the AF control circuit 21, a motor drive circuit 25 that controls the driving of the stepping motor 24 that opens and closes the program shutter 23, a photometric circuit 26 that measures the subject brightness, and a stepping motor 27 are driven to focus the shooting lens. A motor drive circuit 28 for moving to a position is connected, and as will be described later in detail, a photographing lens is provided for each combination of distance measurement data from the AF control circuit 21 and subject brightness data from the photometry circuit 26.
A data table 29 in which ten set positions are associated is connected.

The strobe mode setting unit 30 sends a mode signal to the microcomputer 22 according to the manual setting position of the knob 30a. When the knob 30a is set to the index "OFF", flash photography is not performed and the index "ON" is set.
When set to, flash photography is executed regardless of the brightness data and distance measurement data of the subject. Also,
If the knob 30a is set to the index "AUTO",
The microcomputer 22 considers not only the brightness data of the subject but also the distance measurement data to determine the necessity of stroboscopic photography.

The signal processing circuit 20 has a circuit configuration as shown in FIG. 5, and the photocurrent signals from the light receiving elements S1 to S6 are
Each is converted into a voltage signal by the first stage operational amplifier to which the reference voltage V _S1 is applied. This voltage signal also contains the DC component, that is, the photoelectric signal generated by external light such as sunlight.However, since the low-frequency component cutting capacitors are connected to the output terminals of the first-stage operational amplifier, the reference voltage Only the signal component that does not include the DC component is input to the operational amplifier at the stage after V _S2 . The photoelectric output amplified by a constant amplification factor by the operational amplifier in the next stage is the light receiving element.
Two comparators, one for each S1 to S5
31a, 31b, 32a, 32b, ..., 35a, 35b, and the photoelectric output from the light receiving element S6 is input to the comparator 36a.

Comparator 31a, 31b, 32 to which the same photoelectric output is input
A reference voltage V _na , V _nb is applied to each of a, 32b, ..., 35a, 35b by a voltage divider 38. Since the level of this reference voltage is set to V _na <V _nb , the photoelectric output output from each of the light receiving elements and amplified by the first stage and second stage operational amplifiers at a fixed ratio has two types of reference voltages V _na. Compared with _na , V _nb . Then, the photoelectric output is applied to the reference voltage V _na or the reference voltage V _nb in each comparator.
When it is above the high level signal (H signal), and when it is below the reference voltage V _na or V _nb , the low level signal (L signal) appears at the output terminal of each comparator. in this way,
By comparing the photoelectric output from each light receiving element with a comparator to which two types of reference voltages V _na and V _nb having different levels are respectively applied, a binary-sequenced signal output A
_na , A _nb can be obtained, and either of the signal outputs A _na , A _nb can be selected and used according to the intensity of the reflected light from the subject.

In this embodiment, the reference voltages V _na and V _nb are lower on the side of the light receiving element S1 that receives the reflected light from the distant object, and higher on the side of the light receiving element S6 that receives the reflected light from the near object. , V _6a ＞ V _5a ＞ V _4a ＞ ・ ・ ＞ V _1a ,
It is set as V _5b > V _4b >...> V _1b . This is determined in consideration that the reflected light intensity of a long-distance subject is generally lower than that from a short-distance subject. According to this, even when the amplification factors of the first-stage and second-stage operational amplifiers are kept constant, it is possible to obtain a good detection function for reflected light from a subject having an average reflectance such as human skin. You can

Signal outputs A _1a , A of H signal or L signal appearing at the output terminals of the comparators 31a, 31b, 32a, 32b, ..., 36b.
_1b , A _2a , ... A _6a are input to the AF control circuit 21. The AF control circuit 21 is configured as shown in FIG. 6, and outputs the signals A _na and A _nb.
Is input to the clock terminals of the D-flip-flop circuits FF _na and FF _nb (hereinafter simply referred to as FF _na and FF _nb ) provided corresponding to each comparator via the AND gate.

This AF control circuit 21 has a power source V in addition to the above-mentioned FF _na and FF _nb.
Reset pulse generation circuit 43, which outputs a reset pulse after a certain period of time from applying _CC , microcomputer 22
A counter 45 for counting clock pulses supplied from
A shift register 48, etc., which receives signals from the decoders 46, FF _na , FF _nb , which output control pulses for performing a ranging sequence according to the count value of the counter 45, and outputs the signals as ranging data, is provided. There is.

FIG. 7 shows the circuit configuration of the strobe drive circuit 18. This strobe drive circuit 18 includes a discharge tube 3 for distance measurement,
A discharge tube for shooting that illuminates the subject with auxiliary illumination light during shooting
It controls the operation of both 17 and. The capacitors C ₁ and C ₂ are for supplying emission energy to the discharge tubes 17 and 3, respectively, and are charged through the booster circuit 49. One capacitor
A serial switch device 50 is connected to C ₁ . The switch device 50 is turned on when an H signal is input from the microcomputer 22 to the terminal T ₆ , and is turned off when an L signal is input. When the semiconductor switch shown in FIG. 8 is used for the switch device 50, it becomes unnecessary to continuously give the H signal to the terminal T ₆ when the capacitor C ₁ is charged. In addition, each terminal provided in the flash drive circuit 18
T ₁ , T ₂ , T ₃ , T ₄ , and T ₅ are the oscillation start signal input terminal of the booster circuit 46, the oscillation prohibition signal input terminal, the charging completion signal transmission terminal of the capacitor C ₂ , and the light emission of the discharge tube 17 for photographing. It is used as a trigger signal input terminal and a light emission trigger signal input terminal of the distance measuring discharge tube 3.

FIG. 9 conceptually shows the data table 29.
Program shutter for each brightness data (EV value) of the subject
The maximum aperture diameter (F _N0 ) of 23 is made to correspond, and the data area of 8 rows and 11 columns is provided according to the combination of the EV value and the light receiving pattern of the light receiving elements S1 to S6. In addition, light receiving element
Regarding the light receiving patterns of S1 to S6, “◯” indicates that light is incident, “x” indicates that light is not incident, and “−” indicates that light is not incident.

The data table 29 also stores the standard shutter pulse number when the program shutter 23 is opened to the maximum opening diameter according to the EV value. For example, when the EV value is 16, the shutter pulse data “72” is fetched from the data table 29 into the microcomputer 22. Then, while the 72 clock pulses are counted by the microcomputer 22, the program shutter 23 is opened to “F14.5” via the stepping motor 24, and the subsequent 7
The program shutter 23 is closed by the two clock pulses. The strobe pulse data is
It determines the flash emission timing in the flash "ON" mode, and is stored as the number of clock pulses from the moment the program shutter 23 is opened.

Three-digit control data representing “strobe flag”, “aperture priority flag”, and “lens set position data” is stored in the data area divided for each combination of the EV value and the light receiving pattern of the light receiving elements S1 to S6. Has been done. The "strobe flag" determines whether or not the flash photography is performed when the strobe mode setting unit 30 is set to the "AUTO" mode. If the flag data is "1", the strobe is automatically set. Shooting is done. The "aperture priority flag" controls the program shutter 23 with aperture priority only when the strobe mode setting unit 30 is set to the "OFF" mode. The aperture value data at this time is stored as the number of clock pulses in the data area in the same manner as the number of shutter pulses, as indicated by the three-digit numerical value in parentheses.

The aperture value data written in the data area in which the "aperture priority flag" is "0" and the "strobe flag" is "1" determines the shutter aperture diameter when stroboscopic photography is performed in the "AUTO" mode. Sometimes used. The “lens set position data” is data for determining a specific position from the lens set positions N _{0 to} N ₉ in FIG. 3, and for this data “3”, the lens set position N
₃ is the lens set position N ₅ for the data “5”
Is supported.

With the above configuration, the operation of the camera is practically performed according to the flowchart of FIG. First, when the power switch is turned on by opening the lens cover or the like, the booster circuit 49 shown in FIG. 7 operates to charge the capacitors C ₁ and C ₂ . When the charging completion signal of the capacitor C ₂ is input to the microcomputer 22, preparation for photographing is completed.

When the power switch of the distance measuring device is turned on at the initial stage of the pressing operation of the shutter button (not shown), the power supply V _CC is applied to the AF control circuit 21, and the distance measuring sequence is executed according to the flowchart shown in FIG. To be done. After a certain time required for the power supply V _CC to stabilize, a reset pulse is output from the reset pulse generation circuit 43 shown in FIG. 6, which resets the FF ₀ for controlling the opening and closing of the AND gate 44, and The H signal appears and the AND gate 44 is opened. At the same time, the counter 45 is reset.

The microcomputer 22 outputs a clock pulse to the AF control circuit 21 after a delay of a predetermined time from turning on the power switch of the distance measuring device. During this delay of the predetermined time, the reference voltage V _na , given to each comparator of the signal processing circuit 20,
Stabilization of V _nb is performed. The clock pulse from the microcomputer 22 is supplied to the counter 45 through the AND gate 44. The decoder 46 controls the distance measuring sequence according to the count value of the clock pulse in the counter 45.

Decoder 46 is shift register 48, F by Sig3, Sig4
After resetting F _na and FF _nb , the terminals of the strobe drive circuit 18
The AF trigger signal is output to T ₅ . This allows the capacitor C ₂
The discharge tube 3 emits light due to the electric charge stored in. Immediately after the AF trigger signal is output, the decoder 46 outputs a read pulse Sig5 having a predetermined pulse width, and this read pulse Sig5 is one input of an AND gate connected to each clock terminal of FF _na and FF _nb. Supplied to the terminal.

The other terminal of the AND gate has a signal processing circuit 18
, Comparators 31a, 31b, 31a, 31b, ..., 35a, 35
Since the output terminals of b and 36a are connected, the binarized signal output A _na , A _nb of the L signal or the H signal is latched by FF _na , FF _nb while the read pulse is at the H level. . When the signal outputs A _na and A _nb are H signals, the corresponding FF _na and FF _nb are set, and “1” appears at the Q terminal.

When a certain period of time has elapsed after the read pulse was output, the H signal is output from the decoder 46 to the "ON / OFF" terminal of the shift register 48 by Sig2. Further, the H signal causes the AND gate 55 to be in an open state. Therefore, through the AND gate 44, the shift register 48 “CK
The clock pulse input to the (clock) terminal also passes through the AND gate 55 and is supplied to the microcomputer 22 as a distance measurement clock pulse.

When a clock pulse is supplied to the “CK” terminal while the H signal is being input to the “ON / OFF” terminal of the shift register 48, this clock pulse will transfer the data stored in each bit position of the shift register 48 to the next position. It acts as a shift pulse that is sequentially moved to the bit positions of the stage. Further, since Sig1 is at the low level at the start of the distance measurement sequence, the Q terminal output of FF _na is first captured in the shift register 48, and this is the first distance measurement data detected by the low reference voltage in the microcomputer 22. Transferred to. For example, in the signal output A _na , A _3a and A _4a are H signals and FF _3a and FF are
_{When 4a} is set, the first distance measurement data "001100" is transferred to the microcomputer 22. The first distance measurement data indicates that the light receiving elements S3 and S4 have incident light at a level higher than a specified level.

The microcomputer 22 uses the first distance measurement data “00
1100 ”and the brightness data (EV value) of the subject obtained from the photometric circuit 26, the first lens set position is obtained by referring to the data table 29. For example, if the brightness data at this time is “EV12”, the control data of “103” is extracted from the data table 29, whereby the first lens set position N ₃ is extracted.
Is required.

When the first lens set position N ₃ is thus determined, the decoder 46 switches the signal Sig1 to the high level, and then FF _nb
The Q terminal output of is taken into the shift register 48. The signal output A _nb thus taken in, that is, the signal output A from the comparators 31b, 32b, ... 35b to which a high reference voltage is applied.
_nb is transferred from the shift register 48 to the microcomputer 22 in the same manner as the transfer of the first distance measurement data. The thus-transferred second distance measurement data indicates that the light-receiving element S3 has light incident on it for a predetermined amount or more. Is "000100", the luminance data is "EV12", the microcomputer 22 refers to the data table 29 to extract the control data of "005", thereby the second lens setting position N ₅ is determined.

When the first and second ranging data are fetched by the microcomputer 22 as described above, the signal Si from the decoder 46 is output.
g6 goes low. As a result, FF0 is set via the inverter 58, the AND gate 44 is closed, the counting of the counter 45 is stopped, and the process of capturing the distance measurement data is completed.

Based on the first and second lens set positions N ₃ and N ₅ obtained as described above, the microcomputer 22 determines which lens set position is suitable according to the flowchart of FIG. To do. That is, assuming that the first lens set position is N _a and the second lens set position is N _b , (i) if “N _b = N ₀ ”, then N _a (ii) “N _b = N _a ” or “ In the case of N _a ≦ N _b −2, N _a (iii) In the case of “N _a = N _b −1”, the final lens set position is determined according to the condition of N _a (= N _b ). . In the above case, N ₃ is determined as the final lens set position according to the condition (ii). When the above conditions (i), (ii), and (iii) are not met, that is, when “N _a > N _b ”, error processing such as distance measurement abnormality display and re-distance measurement is performed.

In this way, the final lens set position N ₃ is determined by the microcomputer 22, and the strobe flag, the aperture priority flag, the lens set position, and the control data of the aperture value data in the selected data area are taken into the microcomputer 22. And a microcomputer
The lens drive 22 outputs drive pulses of the number corresponding to the lens set position N ₃ to the motor drive circuit 28, and the photographing lens 10 is moved to the lens set position N ₃ via the stepping motor 27. When the movement of the photographing lens 10 is completed, the shutter button is automatically unlocked and photographing can be performed.

When the shutter button is further pressed, the setting state of the flash mode setting unit 30 is checked as shown in FIG. When the "AUTO" mode is set, it is determined whether the strobe flag in the control data is "0" or "1". In the case of the above example, since the strobe flag is "1", stroboscopic photography is automatically executed. When the flash photography is performed, the program shutter 23 is opened / closed based on the aperture value data in the data area. That is, as shown in FIG. 11, by supplying "128" clock pulses from the microcomputer 22 to the motor drive circuit 25, the program shutter 23 opens up to the maximum opening position "F7.2", and the subsequent " It is closed by 128 "clock pulses.

In this way, the program shutter 23 is opened and "128"
When the clock pulses are supplied, the microcomputer 22 outputs a trigger signal to the terminal T ₄ of the strobe drive circuit 18. As a result, the discharge tube 17 emits light, auxiliary illumination is given to the subject, and stroboscopic photography is automatically performed.

For example, even if it is "EV12", when the control data of "003" is finally fetched by the distance measurement data "001000", the lens set position is similarly determined as N ₃ , but the strobe flag is set. Is "0", standard program exposure, that is, as shown by the broken line in FIG. 11, "144" in the motor drive circuit 25 so that the maximum opening diameter of the program shutter is "F6.2". The shutter blades are opened until the clock pulse is supplied, and the shutter blades are closed by the subsequent "144" clock pulses. Further, when the “ON” mode is selected by the strobe mode setting unit 30, the program shutter 23 is opened and closed by the standard program exposure, and the discharge tube 17 emits light when the number of clock pulses becomes “172”. To do.

As mentioned above, the “EV
Even under a brightness of about 12 ”, it is possible to improve the focus by deepening the depth of field by taking flash photography with a small aperture in consideration of the distance measurement data and the lens set position. Become.

When the strobe mode setting unit 30 is set to the “OFF” mode, the aperture priority flag in the corresponding data area is set to “0” after the final lens set position is determined.
The exposure control method is automatically changed depending on whether it is "1" or "1". When the aperture priority flag is “0”, for example, when the data area corresponding to “EV12” and the distance measurement data “011000” is finally selected, as shown by the broken line in FIG. Shutter 23 has shutter pulse
Triangular exposure operation is performed so that the maximum aperture is “F6.2” with 144 pieces.

However, if the aperture priority flag is "1", for example, if the same range-finding data "011000" is "EV10", the aperture value data "108" is displayed from within the data area.
Is read into the microcomputer 22. And the
As shown by the solid line in FIG. 12, the program exposure is executed with the aperture priority.

In order to perform such aperture-priority exposure, the number of clock pulses supplied to the motor drive circuit 25 when the shutter blade is opened is interrupted at "108", and the shutter blade is opened after a predetermined time for trapezoidal exposure has elapsed. Just close it. In this case, the exposure will be performed in a small aperture state of about "F9.4" without reaching the standard maximum shutter aperture of "F5.6" of "EV10", so the field of view will be larger than that of standard program exposure. Shooting is performed in a deep state, and the range in focus can be enlarged.
Of course, the time to keep the shutter blades at about "F9.4" for the trapezoidal exposure is determined to be the same as the exposure amount at the standard exposure, and there is a concern about camera shake. It is better to close the shutter blade before the time comes.

〔The invention's effect〕

As described above, according to the camera control device of the present invention, in the data table in which the set position of the photographing lens is associated with each combination of the distance measurement data and the brightness data of the subject, the brightness of the subject is particularly low. Aperture value data used for aperture priority shooting is stored for the area. Then, when non-flash shooting is performed under the subject brightness in the area, aperture priority shooting is performed based on the aperture value data, so the depth of field is reduced even under low brightness. By making the depth deeper, it becomes possible to improve the reliability of focusing of the autofocus device.

[Brief description of drawings]

FIG. 1 is a flow chart showing the procedure executed by an embodiment of the present invention. FIG. 2 is a schematic diagram showing an example of a distance measuring system used in the present invention. FIG. 3 is an explanatory diagram of the lens set position. FIG. 4 is a block diagram showing the circuit configuration of the distance measuring device used in the present invention. FIG. 5 is a circuit diagram showing the configuration of the signal processing circuit. FIG. 6 is a circuit diagram showing the configuration of the AF control circuit. FIG. 7 is a circuit diagram showing the configuration of a strobe drive circuit. FIG. 8 is a circuit diagram showing an example of a switch device used in a strobe drive circuit. FIG. 9 is a conceptual diagram of a data table. FIG. 10 is a flowchart showing the processing at the time of distance measurement. FIG. 11 is an exposure diagram of the program shutter during flash photography. FIG. 12 is an exposure diagram of the program shutter when aperture is prioritized. 2 ...... Light emitting part 3 ...... Discharge tube (for distance measurement) 7 ...... Light receiving part 9 ...... Light receiving sensor S1 to S6 ...... Light receiving element 10 ...... Shooting lens 15 ...... IRED 17 ...... Discharge tube (for shooting) ) 29 ... Data table 30 ... Strobe mode setting section 31a, 31b, ..., 36a ... Comparator 38 ... Voltage divider FF _na , FF _nb ...... D-flip-flop circuit.

Claims (3)

(57) [Claims] 1. A distance measuring means for outputting distance measuring data corresponding to a subject distance, a photometric means for outputting luminance data of a subject, and a set position of a photographing lens for each combination of the distance measuring data and the luminance data. Corresponding data table, strobe mode setting to select either strobe auto mode, which automatically fires the strobe when shooting low-brightness subjects, or strobe off mode, which prohibits strobe firing regardless of subject brightness And means,
In the data table, the aperture diameter data for determining the maximum aperture diameter of the program shutter at the time of shooting corresponding to the brightness data, and the aperture for performing the aperture priority shooting according to the combination of the distance measurement data and the brightness data. Value data is stored, and when the strobe off mode is selected by the strobe mode setting means, the aperture priority shooting is automatically selected according to the combination of the distance measurement data and the brightness data based on the data table. The control device for a camera is characterized in that the maximum aperture diameter of the program shutter is regulated by the aperture value data prioritizing the aperture diameter data to perform photographing. 2. When the strobe auto mode is selected by the strobe mode setting means, the maximum aperture diameter of the program shutter is determined by the aperture diameter data stored in the data table corresponding to the luminance data. The control device for the camera according to claim 1. 3. The camera control device according to claim 1, wherein the distance measuring means is capable of outputting distance measuring data obtained from a plurality of positions within the photographing screen.