JPH0560967A - Camera - Google Patents

Abstract

PURPOSE:To easily perform soft focus photographing by controlling the degree of a soft focus effect by changing a shutter speed when exposure degree is changed at the ratio of exposure and controlling a stop value so that it may be open side priority in an exposure control mode. CONSTITUTION:In the case of soft focus photographing, a program diagram is such one that the stop value may be open side priority. Namely, in the case of the program diagram A at the time when the open F number of a lens is 2.0, a continuous line La expresses the open F number and a broken line Pa expresses the combination of an aperture and the shutter speed. In this exposure control pattern, F2.8 is prioritized even when the open F number is 2.0, and the aperture is stopped down after photometric value shows that it is completely bright and the shutter speed attains 1/2000 seconds. In the case of the program diagram B at the time when the open F number of the lens is 5.6, the continuous line Lb expresses the open F number and the broken line Pb expresses the combination of the aperture and the shutter speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a function of performing soft focus photography.

[0002]

2. Description of the Related Art Conventionally, photographs have been used to accurately record the condition of an object, and efforts have been made to minimize aberrations of a photographing optical system such as spherical aberration and chromatic aberration in order to perform more accurate recording. The development of high-refractive-index glass and low-dispersion glass, as well as spherical lenses, and manufacturing technology for aspherical lenses have been developed in order to realize photographic optical systems without aberrations. However, due to the diversification of photographic expressions, soft-focus photography has been used as a technique for photography such as portrait photography. This soft focus shooting is roughly divided into a method that uses a soft focus shooting filter and a method that uses a soft focus shooting lens. The former soft focus shooting method uses vaseline, etc. There is known a method in which a skylight filter coated with the above oil and fat is attached immediately before the taking lens, or a filter having fine irregularities is attached just before the taking lens. In the latter case, the soft-focus shooting lens produces high-order spherical aberration to produce a light flare around the subject image, and the entire image of the subject is captured firmly, but fine details are wrapped in flare. This is a photographic optical system that produces a fantastic effect. In addition, recently, JP-A-61-12
By an advanced design technology using a computer, such as Japanese Patent Publication No. 1021), the optical system has the same aberration as a general lens in a normal use state, but at least one lens in the optical system is arranged in the optical axis direction. A soft-focus imaging optical system that generates high-order spherical aberration by moving the lens to the high-speed side has also been invented.

In addition to the above-described soft-focus photographing method, as a method of performing soft-focus photographing using an ordinary camera and lens, the focal position of the photographing optical system is moved while the subject image is exposed on the film. There are known methods such as an inter-exposure focusing method that produces a soft-focus shooting effect, and a multiple exposure method that captures both a focused subject image and a defocused subject image for the same frame of film.

[0004]

The method of mounting the above-mentioned skylight filter coated with oil and fat such as petrolatum immediately in front of the taking lens is inconvenient for storing and carrying the filter, so that it is easy to take a snap shot outdoors. Not suitable for use in. In addition, a method of attaching a filter having a fine concavo-convex process immediately in front of the taking lens must always be carried, which is an inconvenient method for separating general photographing and soft focus photographing. In that respect, if the lens can be switched between the general shooting and the soft focus shooting described above, it is convenient because there is no special item to carry and the general shooting and the soft focus shooting can be switched instantaneously. Since the diaphragm is effective only in the vicinity of the full aperture because the spherical aberration is used, there is a drawback that the effect is not exhibited in a place where the illuminance of the subject must be narrowed down such as outdoors.

In the following focus-on-exposure method, the photographic optical system is moved while the object image is exposed on the film. Therefore, sufficient focus drive cannot be performed at high shutter speeds or sufficient focus drive can be obtained. It is not practical because the shutter speed often causes overexposure. On the other hand, in the multiple exposure method, the electronic camera of recent years automatically controls the automatic charging of the multiple exposure shutter and the multiple exposure calculation according to the exposure program diagram as shown in FIG. FIG. 6 is a program diagram of a general camera when the open F number of the lens is 2.0.
Represents the open F number, and the broken line P represents the combination of the aperture and the shutter speed.

However, in order to shoot the first shot in a focused state and blur the second shot by a predetermined defocus amount, if the ISO 400 film is used during a bright day, the aperture is set at a shutter speed of 1/500 seconds. F11, the defocus amount is 50Fδ assuming 50δ as the blur amount for exerting the soft focus effect, and δ is 0.035 mm (a general circle of confusion for a 35 mm film), which is constant. Since the (aperture value) is very large at 11, the defocus amount for forming the blurred image of the second shot is very large, and there is a drawback that a large amount of lens driving is required. Further, depending on the subject position and the maximum amount of lens extension, it may not be possible to achieve 50Fδ.

Therefore, in order to enable the conventional camera to easily and soft-focus the image as intended by the photographer, there remains a problem to be solved.

The conventional camera also has the following problems. That is, the soft focus effect can be freely changed by changing the exposure ratio of the first exposure and the second exposure, but in order to change the soft focus effect by the exposure ratio of the first exposure and the second exposure, the soft focus effect of FIG. When the exposure amount is determined by such a conventional program diagram, both the shutter speed and the aperture value need to be changed, which is not efficient. In particular, in order to change the aperture, there are two ways to narrow down the aperture value to the desired aperture value for the second shot or move from the aperture position for the first shot to the aperture position for the second shot. It takes a very long time to re-drive the diaphragm, and in the latter case, precise driving of the diaphragm blades is required, and it is necessary to solve this point.

An object of the present invention is to solve the above-mentioned problems and to provide a camera capable of performing soft-focus shooting more easily and quickly than a conventional camera and without causing a significant increase in camera cost. ..

[0010]

In the camera of the present invention, a program diagram shown in FIG.
Alternatively, by setting the program diagram as shown in FIG. 3B in which the aperture value has the open priority, the lens driving amount for forming the second shot blurred image can be minimized, and the processing time can be shortened. It is possible to expand the shooting brightness area of a subject.

In the camera of the present invention, in the case of soft focus shooting, the soft focus effect is first changed by making the program diagram such that the aperture value is fixed as shown in FIG. Even when the exposure ratio between the exposure and the second exposure is used, the exposure ratio can be changed only by changing the shutter speed, and the processing time can be shortened without changing the aperture value.

[0012]

1 is a block diagram of a camera according to the present invention, in which 1 is a microcomputer for controlling each processing of the camera, 2 is a shooting mode dial for inputting a shooting mode, and 3 is an output of a photometric sensor 23 for measuring subject brightness. An A / D converter for fetching a signal into the microcomputer 1, 4 is an A / D converter for fetching an output signal from the line sensor in the AF sensor unit 60 into the microcomputer 1, and SW1 is an interlocking switch 1 with a release button. SW2 is a start switch that turns on at the second step, and SW2 is a release start switch that turns on at the second step in conjunction with the release button, SW
3 is a back cover open / closed detection switch for detecting the opening / closing of the back cover of the camera, SW4 is a film loading detection switch for detecting that a film is loaded in the camera's cartridge chamber, 2
3 is a photometric sensor for measuring subject brightness, 30 is a shutter unit, 40 is a mirror unit, 60 is an AF unit for detecting focus position, 50 is a photographing lens unit, 51 is a photographing lens with adjustable focus position, and 52 is focus adjustment. Motor, 53 is an encoder for detecting the drive amount of the focus adjustment motor, 54 is a diaphragm unit for adjusting the amount of light transmitted through the lens,
Reference numeral 55 is a lens unit control device.

FIG. 2 is a view for explaining the mechanical arrangement of the camera according to the present invention, in which 21 is a penta prism for a viewfinder and 22
Is a photometric optical system for forming an image on the photometric sensor 23,
Reference numeral 31 is a focal plane shutter driving device, 32 is a front curtain of the focal plane shutter, 33 is a rear curtain of the focal plane shutter, 41 is a mirror driving motor, and 42 is a semitransparent for dividing an optical path into a finder portion and an AF portion. The main mirror 43 is a sub-mirror for guiding the light beam divided into the optical path to the AF unit 60. Explaining the exposure sequence of the camera with reference to FIG. 2, SW2 is turned on by pressing the release button up to the second step, and the release sequence is started. Next, the microcomputer 1 drives the mirror drive motor 41 to raise the main mirror to the finder side. At this time, as the main mirror 42 rises, the sub mirror 43 is folded behind the main mirror 42 and does not obstruct the optical path between the taking lens 51 and the film surface. When the mirror is raised to the finder side, the microcomputer 1 stops driving the mirror drive motor 41. Next, the microcomputer 1 instructs the shutter drive device 31 to run the shutter front curtain 32, and the first exposure of the image on the film surface is started. After the designated time has elapsed, the microcomputer 1 causes the shutter drive device 31 to display the shutter rear curtain 33.
And the first exposure to the film is completed.

Next, the microcomputer 1 uses the mirror drive motor 41.
Drive to lower the main mirror that was raised to the finder side. At this time, the sub-mirror 43 folded on the back side of the main mirror 42 returns to the original position as the main mirror 42 descends. At the same time, the main mirror 42
The shutter driving spring is charged with the decrease of.
Next, the microcomputer 1 drives the taking lens 50 to defocus the focus position by a predetermined amount and prepares for the second exposure.

Next, the microcomputer 1 uses the mirror drive motor 41.
Drive to raise the main mirror to the viewfinder side. At this time, if it is necessary to shorten the processing time, it is possible to drive the taking lens 50 and the mirror 42 at the same time. After this, the driving of the lens 50 ends and the mirror 42
As the first exposure is completed, the shutter drive device 31 is instructed to move the shutter front curtain 32, and the second exposure of the image on the film surface is started. After the designated time has elapsed, the microcomputer 1 causes the shutter drive device 31 to display the shutter rear curtain 33.
And the second exposure to the film is completed. Next, the microcomputer 1 drives the mirror drive motor 41 to lower the main mirror that has been raised to the finder side.
At this time, the sub-mirror 43 folded on the back side of the main mirror 42 returns to the original position as the main mirror 42 descends. At the same time, the spring for driving the shutter is charged as the main mirror 42 descends. With the above, the first and second exposures are completed, and the film is fed for one frame to prepare for photographing the next frame.

FIG. 3 is a program diagram showing a pattern of exposure control of the camera according to the present invention. FIG. 3A is a program diagram when the open F number of the lens is 2.0, the solid line La represents the open F number, and the broken line Pa represents the combination of the aperture and the shutter speed. In this exposure control pattern, even if the open F number is 2.0, F2.8 is given priority in consideration of the peripheral light amount and blurring of the lens, the photometric value is sufficiently bright, and the shutter speed is 1/2000 seconds. After reaching, it will be narrowed down. FIG. 3B is a program diagram when the open F number of the lens is 5.6, the solid line Lb represents the open F number, and the broken line Pb represents the combination of the aperture and the shutter speed. In this exposure control pattern, since the open F-number is 5.6, it is impossible to prioritize F2.8, and therefore the priority is F2.8.

FIG. 4 is a diagram for explaining the soft focus photographing method of the camera according to the present invention. FIG. 4A shows the first exposure on the film surface in a focused state, and a sharp object image is projected on the film surface. There is. FIG. 4B shows the second exposure on the film surface in the defocused state, the lens is arranged at a position different from the in-focus state, and a blurred subject image is projected on the film surface.

FIG. 4C is a diagram for explaining a subject image finally exposed on the film. A sharp subject image by the first exposure and a blurred subject image by the second exposure are combined to produce a soft focus effect. There is.

FIG. 5 is a flow chart showing the operation of the camera according to the present invention. Each operation will be described below with reference to the flow chart.

# 1001: System initialization The microcomputer 1 resets I / 0 (microcomputer peripheral IC) and initializes memory. At this time, the operation continuation timer (not shown) is also reset.

# 1002: Confirmation of film prewind The microcomputer 1 confirms the opening / closing of the camera back lid by the back lid opening / closing switch SW3, confirms the film loading in the cartridge chamber by the film loading switch SW4, and closes the back lid to load the film. If the film has not been pre-wound in this state, the process branches to # 1003. # 1 otherwise
Branch to 005.

# 1003: Film prewind The microcomputer 1 winds the film of the cartridge onto the spool side until it detects that the film is tight. Here, the detection of the slipperiness of the film is to judge the slipperiness of the film by the fact that a signal from a film movement detection means (not shown) for detecting the movement of the perforation of the film does not occur within a unit time. During the prewind operation, the number of filmable frames of the film is calculated by counting the signals from the film movement detecting means and stored.

# 1004: Film sensitivity setting The microcomputer 1 starts from the film in the cartridge chamber to DX (not shown).
The code reading means reads the DX code and stores the sensitivity of the film. At this time, if the film does not support the DX code, the sensitivity of the film is manually set.

# 1005: Input of shooting mode The microcomputer 1 reads the shooting mode selected by the selection dial 2 and stores the current shooting mode.

# 1006: SW1 state confirmation The microcomputer 1 reads the state of the start switch SW1 arranged in the first stage of the release button, and when the first stage of the release button is pressed and SW1 is on, # 100.
The process branches to 7 to continue the operation. When SW1 is off, the process branches to # 1013 to check the operation continuation timer.

# 1007: Reset of operation continuation timer The microcomputer 1 resets the operation continuation timer and extends the operation time when the activation switch SW1 is ON.

# 1008: Photometric processing A part of the image formed on the finder by the taking lens 51 is
After passing through the pentaprism 21, it is guided to the photometric IC 23 by the photometric optical system 22, and the microcomputer 1 converts the output signal of the photometric IC 23 into a digital amount by the A / D converter 3 and reads it and stores it as a photometric value.

# 1009: Calculation of exposure amount The microcomputer 1 stores the photometric value stored in # 1008 and # 1004.
The shutter speed and aperture value are calculated and stored based on the film sensitivity stored in step S1005 and the shooting mode stored in step # 1005. At this time, if the shooting mode is the normal mode, the shutter speed and the aperture value are calculated according to the program diagram shown in FIG. 6. In the soft focus shooting mode, the program diagram shown in FIG. The shutter speed and aperture value for the first exposure and the second exposure are set in accordance with.

# 1010: Distance measuring process The image taken by the photographing lens 51 is a semi-transparent main mirror 42.
And is guided to the AF sensor unit 60 by the sub mirror 43. The above-mentioned optical image is divided into a pair of image signals by the pupil dividing means in the AF sensor unit, and the line sensor 6
At 1, it is output as an electric signal. The microcomputer 1 converts the output signal into a digital amount by the A / D converter 4 and reads it, and stores it as an AF image signal. After that, the microcomputer 1 performs a correlation calculation or the like on the AF image signal to calculate the defocus amount.

# 1011: Focusing Confirmation The microcomputer 1 branches from # 1010 to the defocus amount in # 1010 when it determines that it is in focus, and checks the release start, and when it determines that it is out of focus, # 1012. Branch to and drive the lens.

# 1012: Lens AF drive The microcomputer 1 calculates the focus drive amount of the lens from the defocus amount in # 1010 and instructs the control device 55 in the photographing lens unit 50 to drive, and the control device 55 causes the lens drive motor. The drive of 52 is controlled. The control device 55 controls the positioning of the taking lens 50 by an output signal from the encoder 53 for confirming the lens driving amount in the taking lens unit 50. After this, the process returns to # 1002.

# 1013: Confirmation of operation continuation timer The microcomputer 1 confirms the operation continuation timer when the start switch SW1 is off, and if the operation continuation timer has reached a predetermined count, branches to # 1014 to execute the system stop processing. Is executed, and if the predetermined count is not reached, # 1002
Return to.

# 1014: System stop process The microcomputer 1 stops a DC / DC converter (not shown) or the like, or stops the energization of each actuator to stop the camera system.

# 1015: SW2 state confirmation The microcomputer 1 reads the state of the release start switch SW2 arranged in the second stage of the release button, and when the second stage of the release button is pressed and SW2 is ON. Branch to # 1020, enter release sequence, and switch
When 2 is off, the process returns to # 1002.

# 1020: Exposure parameter calculation The microcomputer 1 uses the shutter speed and aperture value stored in # 1009 to set the front curtain 32 of the focal plane shutter.
Then, the traveling start timing of the rear curtain 33 is set, and similarly, the driving amount of the diaphragm device 54 in the lens unit 50 is set.

# 1021: Main mirror up The microcomputer 1 drives the mirror drive motor 41 to raise the main mirror 42 to the finder side. At this time, the sub mirror 43 moves up in conjunction with the main mirror 42, and is finally folded by the main mirror 42.

# 1022: Aperture drive (narrowing drive) The microcomputer 1 drives the aperture device 54, which was in an open state in order to observe the subject with the finder, by the aperture drive amount set in # 1020 to bring the predetermined aperture state for photographing. To

# 1023: Shutter drive (film exposure) The microcomputer 1 sets the shutter front curtain 32 set in # 1020.
The drive control of the shutter is carried out according to the start timing of the trailing curtain 33 to expose the film.

# 1024: Confirmation of Soft Focus Shooting Mode When the shooting mode stored in # 1005 is the soft focus shooting mode, the microcomputer 1 branches to # 1031 to calculate the lens drive amount for the soft focus shooting mode, and then the normal mode. If so, the process branches to # 1025 to bring down the main mirror.

# 1025: Main mirror down The microcomputer 1 drives the mirror drive motor 41 to move to # 10.
The main mirror 42, which has been moved up in step 21, is moved down to its original position. At this time, the sub-mirror 43 folded by the main mirror 42 returns to the original position in conjunction with the main mirror 42. Further, the drive spring of the shutter drive device 31 is charged by the down drive of the main mirror 42.

# 1026: Aperture drive (aperture open drive) The microcomputer 1 drives the aperture device 54 so that the aperture device 54 narrowed down in # 1022 is opened.

# 1027: Confirmation of film loading The microcomputer 1 returns to # 102 when a film is loaded.
The process branches to 8 to feed the film, and when the film is not loaded, the process returns to # 1002.

# 1028: Film feeding The microcomputer 1 drives the film feeding device (not shown) to drive the film until the signal from the film movement detecting means (not shown) for detecting the movement of the perforation of the film reaches one frame. Feed only one frame.

# 1029: Confirmation of end of film After feeding one frame of film in # 1027, if the total number of film feeding frames does not reach the number of film frames stored in # 1003, the process returns to # 1002. If the total number of film feed frames reaches the number of film frames # 1
Move to 030.

# 1030: Film end warning A film end warning is issued to the user to prohibit operations other than film refilling, and wait for film refilling.

# 1031: Calculation of lens drive amount The microcomputer 1 calculates a lens drive amount such that the defocus amount becomes a predetermined amount. For example, P is the number of lens drive pulses, n is the required defocus magnification = 50, F is the aperture value =
2.8, δ is the circle of least confusion = 0.035 mm, d is the lens pulse pitch = 0.005 mm, s is the lens sensitivity =
When 1.0, the minimum circle of confusion is 0.035 and the aperture value is 2.
8 the first exposure is in focus and the second exposure is a predetermined amount (50 F
When it is desired to defocus only δ) for exposure, P = {(n × F × δ) / s} / d = {(50 × 2.8 × 0.035) /1.0} / d = 875 [ Pulse].

# 1032: Start of lens drive The microcomputer 1 instructs the controller 55 of the photographic lens unit 50 about the focus drive amount of the lens calculated in # 1031.

# 1033: Main mirror down The microcomputer 1 drives the mirror drive motor 41 to move to # 10.
The main mirror 42, which has been moved up in step 21, is moved down to its original position. At this time, the sub-mirror 43 folded by the main mirror 42 returns to the original position in conjunction with the main mirror 42. Further, the drive spring of the shutter drive device 31 is charged by the down drive of the main mirror 42.

# 1034: Main mirror up The microcomputer 1 drives the mirror drive motor 41 to raise the main mirror 42 to the finder side. At this time, the sub mirror 43 moves up in conjunction with the main mirror 42, and is finally folded by the main mirror 42.

# 1035: Confirmation of lens drive stop The microcomputer 1 confirms whether or not the lens driven in # 1032 is stopped, and if it is stopped, branches to # 1040.
If it is driving, wait until it stops.

# 1040: Confirmation of lens abutment In the microcomputer 1, the lens driven in # 1032 is # 103.
It is determined whether or not the lens can be driven by the focus drive amount calculated in 1, and if it cannot be driven by the desired amount, it is regarded as an abutment (infinity end or near end) and the process is branched to # 1041 and the lens inversion drive condition is determined. Is calculated, and if the desired amount of driving has been performed, the process branches to # 1046 to calculate the exposure parameter of the second exposure.

# 1041: Calculation of lens inversion drive condition The focus drive amount of the lens calculated in # 1031 is P,
It is determined that the lens inversion drive is not necessary if either of the following two conditions is satisfied, where Pr is the amount of drive that the lens can actually be driven and D is the maximum amount of defocus of the lens. (1) Pr> 0.70 × P (2) Pr> 0.35 × D / d That is, the actual lens drive amount Pr is 7 which is the predetermined drive amount P.
0% or more, or the actual lens drive amount Pr is 35% of D / d
If it is above (D / d represents the maximum number of drive pulses), it is determined that the lens inversion drive is not necessary. (1)
The condition of means that the effect of soft focus photography can be expressed if Pr reaches 70% of P, and the condition of (2) performs reverse drive if Pr reaches 35% of the maximum drive pulse number. However, it means that the probability of obtaining a desired defocus amount is low.

# 1042: Confirmation of lens reversal drive When the lens reversal drive is not necessary, the process branches to # 1046 to calculate the exposure parameter of the second exposure, and when the reversal drive is required, the process branches to # 1043 to determine the lens reversal drive. The inversion drive amount is calculated.

# 1043: Calculation of lens drive amount The microcomputer 1 calculates the reversal drive amount Px from the lens drive amount P calculated in # 1031 and the drive amount Pr actually driven by the lens.
=-(P + Pr) is calculated.

# 1044: Start of lens drive The microcomputer 1 instructs the photographic lens unit 50 about the focus drive amount of the lens calculated in # 1043.

# 1045: Confirmation of lens drive stop The microcomputer 1 confirms whether or not the lens driven in # 1044 is stopped, and if it is stopped, branches to # 1046,
If it is driving, wait until it stops.

# 1046: Exposure parameter calculation The microcomputer 1 uses the shutter speed and aperture value stored in # 1009 to set the front curtain 32 of the focal plane shutter.
Then, the traveling start timing of the rear curtain 33 is set, and similarly, the driving amount of the diaphragm device 54 in the lens unit 50 is set.
After this, the soft focus shooting mode is temporarily released and the process returns to step # 1022.

The above is a description of each operation according to the flowchart of FIG. 5. Explaining the exposure amount calculation in step # 1009 in more detail, there are many opinions about the definition of the proper exposure amount. It is generally 0.075 to 0.1 [1 ux · sec] for the film. Considering 0.08 [1ux · sec] as the proper exposure amount, the product of the exposure amount H and the ISO sensitivity S is H × S = 8.0, and the exposure amount H is the image plane illuminance I and the effective exposure time T. , B is the subject brightness, F is the aperture value, and k is the coefficient such as the transmittance of the lens.

[0059]

[Equation 1]

There is a relational expression. From the relational expression of the exposure amount H and the definitional expression of the EV value,

[0061]

[Equation 2]

The EV value can be calculated as The subject brightness B is obtained as a photometric value by the photometric sensor 23. After that, from the EV value obtained by the above calculation, if the shooting mode is the normal mode, the combination of the shutter speed and the aperture value is set according to the program diagram shown in FIG. The combination of the shutter speed and the aperture value is set according to the program diagram shown in FIG. Further, in the soft focus shooting mode, the shutter speed and aperture value of the first exposure and the second exposure are set in accordance with the degree of soft focus effect so that the proper exposure can be obtained with a plurality of exposures.

[0063]

As described above, in the camera of the present invention, the program diagram shown in FIG.
By setting the program diagram such as A and FIG. 3B in which the aperture value has the open priority, the lens drive amount for forming the second shot blurred image can be minimized, and the processing time can be shortened. It is also possible to enlarge the photographing brightness area of a subject.

Further, in the camera of the present invention, when the pseudo soft focus image is photographed, the soft focus effect can be changed by making the program diagram such that the aperture value is fixed as shown in FIG. Even when performing the exposure ratio of the first shot and the second shot, the exposure ratio can be changed only by changing the shutter speed, and it is possible to shorten the processing time by eliminating the need to change the aperture value.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a camera according to the present invention.

FIG. 2 is a diagram illustrating a mechanical arrangement of a camera according to the present invention.

FIG. 3 is a diagram showing an exposure control pattern of a camera according to the present invention.

FIG. 4 is a diagram illustrating a soft focus effect by a multiple exposure method.

FIG. 5 is a flow chart showing the operation of the camera according to the present invention.

FIG. 6 is a diagram showing an exposure control pattern of a conventional camera.

[Explanation of symbols]

1: Microcomputer controlling each processing of the camera 2: Shooting mode dial 3: A / D converter for photometric sensor 4: A / D converter for AF sensor SW1: Start switch SW2: Release start switch SW3: Back lid open / closed detection Switch SW4: Film loading detection switch 23: Photometric sensor 60: AF unit 50: Photographing lens unit 51: Photographing lens 52: Focus adjustment motor 53: Encoder 54: Aperture unit 55: Lens unit controller 21: Finder pentaprism 22 : Photometric optical system 31: Shutter drive device 32: Shutter front curtain 33: Shutter rear curtain 41: Mirror drive motor 42: Main mirror 43: Sub mirror

Claims (2)

[Claims] 1. A photographic optical system having a variable focus position, a focus position changing means for changing the focus position of the photographic optical system, a photometric means for measuring subject brightness, and at least two or more exposure control modes. In a camera having an exposure control means for controlling exposure based on the photometric value of the photometric means, and a multiple exposure function for performing multiple exposures on the same light-sensing portion, a shooting mode selection for selecting a shooting mode When the soft focus shooting mode is selected by the shooting mode selection means, the control operation is performed such that the exposure control mode gives priority to the aperture value on the open side. A camera to do. 2. A photographing optical system having a variable focal position, a focal position changing means for changing the focal position of the photographing optical system, a photometric means for measuring subject brightness, and at least two or more exposure control modes. And a multi-exposure function for performing multiple exposures on the same light-sensing portion, and software for executing a soft-focus shooting mode. A camera having a focus photographing means, wherein the soft focus photographing means has a function of changing a soft focus effect degree by a multiple exposure shutter speed by using a multiple exposure function.