JP2814597B2 - Camera with switchable film size - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a camera capable of taking a continuous photograph in one frame of a film, and more particularly, to switching of a film size to be photographed and a single or a plurality of films in one frame. The present invention relates to a camera that can shoot images.

(Prior Art) Conventionally, a single-lens reflex camera or the like has been known in which an exposure operation and a film winding operation are repeated while a release button is pressed to enable continuous photographing, so-called continuous shooting. ing.

On the other hand, a screen size variable camera that changes an opening dimension of an aperture member in two steps is known as a camera capable of switching an area that can be exposed to a film between a full size and a half size.

(Problems to be solved by the invention) However, in a camera capable of continuous shooting as described above,
For example, if continuous shooting of three frames is performed per second, only 12 seconds of shooting can be performed on 36-frame film, and if you want to perform continuous shooting for a longer time, or if you want to save film, etc. Was inconvenient. Also, in order to view the continuously photographed photographs arranged in an album or the like, in the above-described apparatus, the number of prints corresponding to the number of consecutively photographed images must be attached to the album. It was no longer possible, and had a problem in the ornamental form.

Further, in the screen size variable camera as described above, for example, when the photographing size is switched in one film, the full size and the half size are mixed, and the developing lab cannot cope with this and is shunned. I was Further, even if the size is switched to the half size only during continuous shooting in order to save film and extend continuous shooting time, the problem of viewing prints on the album has not been solved.

The present invention has been made in view of such a problem, and firstly, continuous shooting for a longer time is possible, and secondly,
Thirdly, it is an object of the present invention to obtain a continuous photographing device which can save a film at the time of continuous shooting, and which is easy to see when pasted on an album or the like for viewing.

(Means for Solving the Problems) In order to achieve the above object, the present invention divides each frame of a film into a plurality of windows at the time of continuous photographing so that one shot can be taken for each window. I made it.

Specifically, the film size switchable camera according to the present invention includes an aperture member that determines a maximum photographable area on the film, and an aperture that can advance and retreat into an opening of the aperture member, and that has an aperture with respect to a feeding direction in which the film is fed. A light-shielding plate for changing the opening size of the member, and a second position for retracting the light-shielding plate from the aperture member to reduce the opening size in the first position and the feeding direction to approximately (1 / N) to maximize the photographable area. A switching member capable of switching the light shielding plate between the first position and the second position, a detection unit for detecting whether the light shielding plate is at the first position or the second position, a film winding unit, and a light shielding plate by the detection unit. Is detected to be at the first position, the film is wound up by a constant first winding amount for each exposure by the film winding means, and the light shielding plate is moved to the second position.
Is detected by the film winding means at the second winding amount equal to substantially (1 / N) of the opening size in the feed direction for each exposure until the (N-1) th exposure.
-1) The winding is performed once, and after the N-th exposure, the third winding is smaller than the first winding amount but larger than the second winding amount.
Control means for performing one winding with the amount of winding.

(Operation) According to the camera of the present invention, one frame on the film is divided into N windows, and one shot is taken for each window. In other words, N shots are taken as one set of shots in the range of one frame. In the case where M frames are photographed in this manner, M × N shots can be recorded although the amount of film used is M frames.

A first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a partial perspective view showing the structure of the first embodiment of the present invention. In FIG. 1, an aperture member 1 which is a part of a camera body is provided with an aperture 1a at a position corresponding to a film shooting screen. The size of the aperture corresponds to the maximum area that can be photographed, and is 35 mm.
In the case of the full size of the film, the length is 24 x 36 mm.

A four-tooth claw 2a provided on the outer periphery of the sprocket 2 for detecting the movement of the film engages with the perforation of the film and rotates with the movement of the film. The rotation is accelerated by the gears 3 to 6 and transmitted to the slit disk 7. The rotation amount of the slit disk 7 is detected by the photo interrupter 8. In this embodiment, when the film is wound up by one frame (36 mm + blank 2 mm = 38 mm), the photo interrupter 8 is used.
From the gears 3 to so that 114 pulses are output from
A speed increase ratio of 6 is set.

The sequence motor 9 is for performing various operations related to release, that is, operations such as raising and lowering a mirror, driving an aperture, and charging a shutter.

The spool 10 is for winding the film, and a film winding motor provided inside the spool 10 is provided.
The output of 11 is transmitted via a gear 12, a reduction mechanism 13, and a gear 15 to a gear 10a integrally provided below the spool 10. The film is wound by such rotation of the spool.

The branch 14 provided in the speed reduction mechanism 13 is a clutch mechanism using a known planetary gear or the like, and transmits the rotation to the gear 15 when the motor 11 is rotating forward and to the gear 16 when the motor 11 is rotating backward. It has become.

The motor 11 is controlled so as to rotate forward when the film is wound up and to rotate backward when the film is rewound. Here, when the film 11 is rewound, the rotation of the motor 11 is transmitted to the gear 16, the shaft 17, and the gears 18 to 19 in accordance with the reverse rotation of the motor 11, and the fork 19 is engaged with the hub of the film cartridge provided on the gear 19.
Rotate a to rewind the film.

A focal plane shutter unit 25 is provided in front of the aperture member 1. Aperture 25
Exposure to the film is performed by the shutter curtain included in this unit 25 running inside a. An aperture light shielding plate 20 is provided between the aperture member 1 and the unit, and one end 20 a of which is wound around a shaft 22. The shaft 22 is provided with a rotation behavior in a direction in which the light shielding plate 20 is wound by a spring (not shown). The light-shielding plate pulled out from the shaft 22 is bent by 90 ° on the shaft 21 and enters the aperture 1a. The switching member 30 operable by the photographer is located between the indicated “NORMAL” and “1/3” indices. Is slidable. These indices indicate shooting in full size and three windows, respectively. The position of the switching member 30 is
The switch 31 detects it. That is, the switch 31 is turned off at the index position of “NORMAL” and turned on at the index position of “1/3”. The sliding operation of the switching member 30 is also connected to the light shielding plate 20.

2A and 2B are diagrams showing the operation of the light shielding plate 20. FIG. When the switching member 30 is in the "NORMAL" position, the end 20b of the light shielding plate is located outside the aperture 1a, and the aperture member 1 is not affected by the light shielding plate. Switching member on the other hand
When 30 is in the "1/3" position, the aperture 20c of the light-shielding plate moves to the center of the aperture member 1, and the aperture dimension of the aperture member 1 in the film feeding direction is reduced to 1/3 to enable photographing. Area is limited to the center.

FIG. 3 is a block diagram showing a configuration relating to the circuit of the first embodiment. In FIG. 3, information such as subject brightness, film sensitivity, shutter speed, and aperture value is sent from a known exposure control circuit 51 to a microcomputer (hereinafter referred to as a microcomputer) 50 for controlling various operations of the camera. .

The drive circuit 52 for driving various actuators is connected to the film winding motor 11, the sequence motor 15, the shutter front curtain control magnet 53, the shutter rear curtain control magnet 54, and the aperture control magnet 55. The shutter front curtain control magnet 53 and the shutter rear curtain control magnet 54 control the traveling of the front curtain and the rear curtain of the shutter, respectively. The aperture control magnet 55 has a function of turning on while the aperture sequence is being driven by the release sequence motor 15, and controlling the aperture to a desired size. Each magnet 53
The timing at which to operate the exposure control circuit 55 is determined by the microcomputer 50 based on the data sent from the exposure control circuit 51 so that an appropriate exposure can be obtained.

A signal from the photo interrupter 8 is also input to the microcomputer 50. The switch 31 is the switching member described above.
The switch linked to the switch 30, the switch 56 is a known release switch.

 Next, the operation of the first embodiment will be described.

First, the normal shooting (the switching member 30 is in the “NORMAL” position) will be described. When the release switch 56 is turned on, the sequence motor 9 drives the mirror up and the aperture, and the aperture control magnet 55 controls the aperture. Then, the shutter first curtain control magnet
53, the shutter is moved by the shutter rear curtain control magnet 54 so as to obtain a desired exposure time. Again, the release sequence motor 9 performs mirror down, aperture reset, and shutter charge. The operation so far is referred to as a release sequence in this specification.

During normal operation, following the release sequence, the film winding motor 11 rotates forward to wind the film by one frame. This will be further described. Upon completion of the release sequence, the microcomputer 50 drives the film winding motor 11 through the driving circuit 52 in the normal direction. The spool 10 is driven by the normal rotation of the film winding motor 11. When the winding of the film is started, the slit disk 7 rotates through the sprocket 2 with the movement of the film, and the amount of movement of the film becomes a pulse from the photo interrupter 8 and is fed back to the microcomputer 50. As described above, in this embodiment, since the number of pulses for winding one frame, that is, the first winding amount (38 mm) is set to 114, the microcomputer 50 starts film winding when the number of feedback pulses is 114. The film winding motor 11 is controlled so that the operation ends. This operation is called a winding sequence in this specification.

By the above-described operations of the release sequence and the winding sequence, one normal photographing operation is completed. For reference, the processing operation of the microcomputer 50 in this case is shown in the flowchart of FIG. In FIG. 4, the line returning from step # 104 to step # 102 indicates that continuous shooting is performed when the release button is kept pressed.
The state of the film photographed in this manner is as shown in FIG. 7 (A).

Next, the operation when the switching member 30 is at the index position of “1/3” (the number of windows; N = 3) will be described.

First, when the switching member 30 moves from the index position of "NORMAL" to "1/1 /
When it is moved to the index position of "3", the light shielding plate 20 is also moved to the state shown in FIG. 2 (B). In other words, only 1/3 of the central part of the aperture member opening is in a state where exposure is possible. At the same time, the microcomputer 50 detects that the switch 31 has been turned ON, and performs the operation shown in FIG. That is,
In step # 312, the motor 11 is driven in the reverse direction, and a feedback pulse equivalent to 36 pulses (12
mm). Such rewinding is to prevent a blank space of 1/3 frame from being created on the film when switching from shooting at the normal "NORMAL" position to shooting at the "1/3" position. Do.

When the release switch 56 is operated while the switching member 30 is at the “1/3” index position, the microcomputer 50
Operation 56 is detected, and the operation shown in the flowchart of FIG. 5B is executed. After the release sequence is executed in step # 302, the film is wound up so that the feedback pulse becomes 36 in step # 303. This corresponds to 12 mm (second winding amount) in terms of the amount of movement of the film, and corresponds to exactly 1/3 of the opening size in the film feeding direction. Further, the same operations as steps # 302 and # 303 are repeated once again in steps # 304 and # 305, and the third release sequence is executed in step # 306.
In step # 307, the film is wound up by 42 feedback pulses. This is equivalent to 14 mm (third winding amount) in terms of the amount of film movement, and corresponds to the second winding amount (12 mm) plus 2 mm of blank space between the next screen. As shown in FIG. 7 (B), the film shot in this manner has a continuous three-shot window as a continuous shot in a normal frame of 24 mm × 36 mm. If the release button is kept pressed after one frame (three shots in this case) has been shot, the sixth
In the figure, the same continuous shooting is repeated by the line returning from step # 308 to step # 302.

Once again, the switching member 30 moves from the “1/3” index position to “NORMA
When moved to the index position of "L", the light shielding plate 20 is also moved and returns to the state of FIG. 2 (A). That is, the entire aperture is ready for exposure. At the same time, the microcomputer 50 detects that the switch 31 has been turned off, and performs the operation shown in FIG. That is, in step # 318, the motor 11
Is driven in the normal rotation direction, and winding is performed for 36 pulses (12 mm in film length) as a feedback pulse. This kind of winding can be achieved by shooting from the normal “1/3” position to “N
If you switch to shooting in the `` ORMAL '' position, 1
Performed to prevent doubling of / 3 frames.

FIG. 6 shows a viewfinder according to the first embodiment. The viewfinder screen 60 is provided with a frame 61 indicating a known distance measurement range and a frame 62 indicating a photometry range. Further, in this embodiment, three windows (“1 /
An index 63 is provided as a guide for the composition when performing continuous shooting of the “3” index position). That is, when performing continuous shooting of three windows, the composition may be determined so that the subject falls within the range A of FIG. Note that the index 63 may be displayed only when necessary by an electro-optical element such as a liquid crystal. Further, a portion where photographing is not performed (outside of the index 63 in FIG. 6) may be configured to be covered by using a light shielding plate or liquid crystal. Further, if the covered portion is made translucent, it is possible to prevent a portion that can be visually recognized through the viewfinder from becoming small and making it difficult to determine the composition.

FIG. 8 to FIG. 11 show a second embodiment of the present invention. The structure of the camera of the second embodiment is substantially the same as that shown in FIGS. The normal photographing operation (full-size photographing) is the same as that shown in FIG. However, unlike the first embodiment, in the present embodiment, two windows are provided in one frame, and one shot is shot in each window (N = 2). As a result, the light shielding plate 20 of the second embodiment is as shown in FIG. When the switching member 30 is at the “1/2” position, the opening 20 c of the light shielding plate 20 moves to the center of the aperture member 1. That is, the opening dimension of the aperture member 1 in the film feeding direction is reduced by half, and the photographable area is limited to the center.

The operation of the second embodiment will be described below, but the operation of normal shooting, that is, the operation in the case where the switching member 30 is at the “NORMAL” position is the same as that of the first embodiment, and a description thereof will be omitted.

The operation when the switching member 30 is at the “1/2” position will be described below.

First, when the switching member 30 moves from the index position of "NORMAL" to "1/1 /
When it is moved to the index position of "2", the hour light-shielding plate 20 is also moved to the state shown in FIG. 2 (A) to FIG. That is, only a half of the central portion of the aperture 20c can be exposed. At the same time, the microcomputer 50 detects that the switch 31 has been turned ON. Along with this, as shown in FIG. 9 (a), the motor 11 is driven in the reverse direction in step # 212, and rewinding is performed for 27 pulses (9 mm in film length) as a feedback pulse. . Such a rewind,
This is performed in order to prevent a blank portion of 1/4 frame from being formed on the film when switching from the normal “NORMAL” position to the “1/2” position.

When the release is operated when the switching member 30 is at the "1/2" index position, the microcomputer 50 detects the operation of the switch 56 and executes the operation shown in the flowchart of FIG. 9B. After executing the release sequence in step # 202,
In step # 203, the film is wound up (the second winding amount) so that the feedback pulse becomes 54 times.
This is equivalent to 18mm when converted to the amount of film movement, which corresponds to exactly half of the shooting screen. And step # 204
To execute the release sequence again, and step # 205
Then, film winding (third winding amount) for 60 feedback pulses is performed. This corresponds to a film movement of 20 mm, which is equivalent to exactly 1/2 of the shooting screen plus 2 mm of blank space between the next screen. As shown in FIG. 11 (B), the film photographed in this manner has two continuous frames in a normal frame of 24 mm × 36 mm.
The shot window is imprinted. (Note that FIG. 11 (A) is a diagram for comparison, and 1
The shot is captured in one frame. If the release button is kept pressed even after the shooting of one frame (in this case, two windows) is completed, the same continuous shooting is performed by the line returning from step # 206 to step # 202 in FIG. 9B. To be continued.

When the switching member 30 is returned from the "1/2" index position to the "NORMAL" index position, the light-shielding plate 20 is also moved to the state shown in FIG. 8 to FIG. 2 (A). At the same time, the microcomputer 50 detects that the switch 31 has been turned off, and drives the motor 11 in the normal rotation direction in step # 218 as shown in FIG. The film length is 9 mm). This is to prevent the occurrence of / 4 frame double on the film.

FIG. 10 shows a finder according to the second embodiment.
The viewfinder of the second embodiment is the same as the viewfinder of the first embodiment in FIG. 7 except that the interval between the indices 63 is D / 2.

FIGS. 12 to 14 show a third embodiment of the present invention. The camera of the third embodiment can perform continuous shooting of three windows in one frame as in the first embodiment. The configuration and operation of the third embodiment are almost the same as those of the first embodiment except for the case described below.

Note that the first and second embodiments described above may be incorporated into a single camera so that "1/2" and "1/3" can be switched. In this case, the light shielding plate 20 is provided with two openings for “1/2” and “1/3”, or the light shielding plate is connected to the aperture 1a.
The opening and closing portions may be configured so as to be able to advance and retreat from both left and right sides thereof.

In the third embodiment, as shown in FIG. 12, the horizontal dimension (opening dimension in the film feed direction) of the opening 20c of the light shielding plate 20 is one-third of the aperture dimension of the aperture member 1 in the film feed direction. It is slightly smaller.

The operation of the third embodiment will be described below, but the operation of normal photographing (when the index is at the “NORMAL” position) is the same as that of the first embodiment, and a description thereof will be omitted.

When the switching member 30 is moved from the "NORMAL" index position to the "1/3" index position, the light-shielding plate 20 is also moved to the state shown in FIG. 2 (A) to FIG. At the same time, the microcomputer 50 detects that the switch 31 has been turned ON. Along with this,
As shown in FIG. 13 (a), in step # 312A, the motor 11 is driven in the reverse direction to rewind 37 ° C. pulses (12.3 mm in film length) as feedback pulses. Performing such rewinding is only possible when 1 /
This is to prevent a blank portion for three frames.

The flowchart in FIG. 13B shows a case where a release operation is performed when the switching member 30 is at the “1/3” position. After executing the release sequence in step # 302A, in step # 303A, the film is wound up by 37 feedback pulses (second winding amount).
Perform This is 12.3 mm in terms of the amount of film movement as described above, and the opening shown in FIG.
The dimensions are 11.3mm plus 1mm for 20c. Further, the same operation is repeated once again in step # 304A and step # 305A, and the third release sequence is executed in step # 306A.
Winding of 40 films (third winding amount) is performed. This corresponds to 13.3 mm in terms of the amount of film movement, which corresponds to 11.3 mm of the opening shown in FIG. 12 plus 2 mm of a blank portion between the next screen. The film photographed in this manner is as shown in FIG. That is, a window of three consecutive shots is printed as a continuous shot in a normal frame of 24 mm × 36 mm with a blank portion of 1 mm each.

When the switching member 30 is moved from the "1/3" index position to the "NORMAL" index position, the light shielding plate 20 is also moved and returns to the state of FIG. 12 from FIG. 2 (A). At the same time, the microcomputer 50 detects that the switch 31 has been turned off, and FIG. 13 (c)
As shown in (1), the motor 11 is driven in the normal rotation direction in step # 318A, and winding up is performed for 37 pulses (12.3 mm in film length) as a feedback pulse. This is to prevent the occurrence of ブ リ of a 1/3 frame on the film.

FIGS. 15 to 17 show a fourth embodiment of the present invention. The camera of the fourth embodiment can print two windows in one frame as in the second embodiment. The configuration and operation of the fourth embodiment are almost the same as those of the second embodiment, except for the matters specifically described below.

In the fourth embodiment, as shown in FIG. 15, the lateral dimension of the opening 20c of the light shielding plate 20 (the opening dimension in the film feeding direction) is smaller than 1/2 of the opening dimension of the aperture 1a in the feeding direction. It is slightly smaller.

The operation of the fourth embodiment will be described below, but the operation of normal shooting (when the index is at the position of "NORMAL") is the same as that of the second embodiment, and a description thereof will be omitted.

When the switching member 30 is moved from the "NORMAL" index position to the "1/2" index position, the light shielding plate 20 is also moved, and the state shown in FIG. 2 (A) to FIG. 15 is obtained. At the same time, the microcomputer 50 detects that the switch 31 has been turned ON. Along with this,
As shown in FIG. 16 (a), the motor 11 is driven in the reverse direction in step # 212A, and rewinding is performed for 27.5 pulses (9.15 mm in film length) as a feedback pulse. Performing such rewinding is only possible when 1 /
This is to prevent a blank portion for four frames.

16 (b) shows that the switching member 30 is 1 /
This figure shows the operation of the microcomputer 50 when the release operation is performed when the microcomputer 50 is at the position 2. Step # 202A
After the release sequence is executed in step # 203A, the film is wound up (the second winding amount) so that the number of feedback pulses becomes 55. This corresponds to 18.3 mm in terms of the amount of movement of the film, which is a dimension obtained by adding 0.6 mm to 17.7 mm of the opening shown in FIG. Further, a release sequence is executed in step # 204A, and in step # 205, the film is wound up (third winding amount) for 59 feedback pulses. This is equivalent to 19.7 mm in terms of the amount of film movement, which corresponds to 17.7 mm of the opening shown in FIG. 15 plus 2 mm of a blank portion between the next screen. As shown in FIG. 17, the film shot in this manner is a continuous frame of two consecutive shots with a blank space of 0.6 mm printed in a normal frame of 24 mm × 36 mm.

When the switching member 30 is moved from the "1/2" index position to the "NORMAL" index position, the light-shielding plate 20 is also moved and returns from FIG. 15 to the state of FIG. 2 (A). At the same time, the microcomputer 50 detects that the switch 31 has been turned off, and FIG. 16 (c)
As shown in (2), the motor 11 is driven in the normal rotation direction in step # 218A, and the feedback pulse is wound up by 27.5 pulses (9.15 mm in film length). This is to prevent the occurrence of / 4 frame double on the film.

Also, contrary to the above third and fourth embodiments, windows can be intentionally overlapped with each other. In this case, for example, taking "1/2" of the fourth embodiment as an example, the size of the light-shielding plate opening is 18.3 mm, and the winding amounts of # 203A and # 205A in the flowchart of FIG.
Pulse, 61 pulses. The rewinding and winding amount of # 212A and # 218A is 26.5 pulses. In this way, the two windows are photographed with an overlap of 0.6 mm. Similarly, in the case of "1/3" of the third embodiment, the dimension of the light shielding plate opening is 12.
6 mm, # 303A and # 3 in the flowchart of FIG.
If the winding amount of 05A and # 307A is 35 pulses, 35 pulses and 44 pulses, respectively, and the rewinding and winding amounts of # 312A and # 318A are 35 pulses, images are taken with 0.9 mm overlap between windows. If the windows are always overlapped in this way, there is no blank space between the windows, and each frame can be easily identified. The photographer may be able to switch between providing a space between windows or overlapping windows depending on the background of the subject.

(Effects of the Invention) As described above, in the present invention, each frame of the film is divided into a plurality of windows at the time of continuous photographing, and one shot can be taken for each window. When three windows are provided for a frame, continuous shooting can be performed three times as long as normal continuous shooting. Also, in continuous shooting at the same time, the amount of film used can be "1/3". Furthermore, since the print is also "1/3", it is easy to see when viewing. Further, since a plurality of shots can be recorded in one frame, for example, when shooting a golf swing, three shots during takeback are set to one frame, three shots before and after impact are set to the next one frame, and follow-through shots are set. It is also possible to shoot three shots in the last one frame, and an unprecedented image expression can be realized.

Furthermore, in the present invention, since the window to be photographed corresponds to the center of the viewfinder, the composition is easy to determine, and there is an advantage that the photometry means for autofocus and automatic exposure using the center of the screen can be used as it is. ing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a diagram showing a positional relationship between a switching member and a light shielding plate in the first embodiment, and FIG. 3 is a circuit configuration of the first embodiment. FIGS. 4 and 5 are flowcharts showing the operation of the first embodiment. FIG. 6 is a view showing a finder in the first embodiment. FIG. 7 is an image taken by a camera using the first embodiment. FIG. 8 is a diagram showing the positional relationship between the switching member and the light shielding plate in the second embodiment, FIG. 9 is a flowchart showing the operation of the second embodiment, and FIG. 10 is a second embodiment. FIG. 11 is a view showing a finder in the example, FIG. 11 is a view showing a state of a film photographed by the second embodiment, FIG. 12 is a view showing a switching member and a light shielding plate of the third embodiment, FIG. FIG. 14 is a flowchart showing the operation of the third embodiment. FIG. 15 is a diagram showing the state of the film photographed in the third embodiment, FIG. 15 is a diagram showing the switching member and the light shielding plate of the fourth embodiment, FIG. 16 is a flowchart showing the operation of the fourth embodiment, FIG. It is a figure showing the state of the film photoed by the 4th example. <Description of Signs of Main Parts> 1... Aperture member 1a... Aperture 2... Sprocket 8... Photo interrupter 9... Sequence motor 10. Shield plate opening 30 Switching member 31 Detection switch 50 Microcomputer 52 Driving circuit 56 Release switch 60 Finder screen 63 Index

Claims (3)

(57) [Claims] 1. An aperture member for determining a maximum photographable area on a film, and a light-shielding member capable of moving in and out of an opening of the aperture member and changing an opening dimension of the aperture member with respect to a feeding direction in which the film is fed. A first position at which the light shielding plate is retracted from the aperture member to maximize a photographable area, and a second position at which the opening dimension in the feed direction is reduced to approximately (1 / N). A switching member capable of switching the light shielding plate, a detection unit for detecting whether the light shielding plate is at the first position or the second position, a film winding unit, and the light shielding by the detection unit. When it is detected that the plate is at the first position, the film winding means causes the film to be wound at a constant first winding amount for each exposure, and the light shielding plate is moved to the second position. When it is detected to be in the location it is by the film winding means (N-
1) Until the first exposure, (N-1) windings are performed with a second winding amount equal to substantially (1 / N) of the opening size in the feed direction for each exposure, and after the Nth exposure, Third, which is smaller than the first winding amount but larger than the second winding amount
A film size switchable camera, comprising: control means for performing a single winding with a winding amount of (1). 2. The camera according to claim 1, further comprising a film rewinding unit, wherein the second position is a position for limiting a photographable area to a central portion of the aperture member. When the rewinding means switches the light shielding plate from the first position to the second position,
The film rewinding means causes the film to be rewound by the same amount as a fourth winding amount equal to substantially ((N-1) / 2N) of the opening dimension in the feed direction, and the light shielding plate is moved to the second position. 2. The camera according to claim 1, wherein when the film is switched from the first position to the first position, the film winding means performs the winding by an amount equal to the fourth winding amount. 3. The camera according to claim 1, further comprising a change unit for changing the value of N.