JPH06161027A - Photographic film and camera using it - Google Patents

Abstract

PURPOSE:To change film feeding length in accordance with the size of a photographic image frame in the case of feeding film by one frame. CONSTITUTION:As to photographic film 5, perforation 9 for a standard frame is formed at the rate of one a standard frame 8 on an upper edge part, and perforation 10 for a trimming frame is formed at the rate of one piece perforation 9 a trimming frame 11 pieces on a lower edge part. Then, the film 5 is wound by using the perforation 9 in the case of feeding the film by one frame after the photographing of a standard frame, and using the perforation 10 in the case of feeding the film by one frame after the photographing of a trimming frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film in which unexposed portions are reduced so that photographic images of different sizes can be projected in the film feeding direction, and a camera using the photographic film.

[0002]

2. Description of the Related Art Currently, the most popular photographic film has a width of 35 mm (135 film), and its format is defined by the international standard (ISO: 1007-1979 edition). When the photographic film is loaded into, for example, a 35 mm camera, and the film is fed one frame after photographing, a length (about 38 mm) corresponding to eight perforations formed on both side edges of the photographic film is rolled up. When eight perforations are detected by the sprocket of the camera at the time of winding, the one frame advance of the film is stopped.

By the way, in a camera in which a photo sensor is provided instead of a sprocket to detect perforations, it is more convenient to detect one perforation than to detect eight perforations when winding up. . For this reason, there has been proposed a photographic film in which a perforation is provided for each full-size frame on one side of a 35 mm wide photographic film. In addition, this photographic film does not need to have many perforations at the time of manufacture, and the cost can be reduced.

Further, the applicant of the present invention has proposed a camera in which a movable light shielding member is provided in the exposure chamber of the camera, and the light shielding member is moved in the film feeding direction to change the exposure range.
It is proposed in the specification of 162181. With this camera, it is possible to imprint differently sized photographing screens on the same photo film, so that you can enjoy printed photos with different aspect ratios.

[0005]

However, in the case where the above-mentioned camera is loaded with the photographic film having the perforations formed in a ratio of one per one photographic screen, each photographic screen is as shown in FIG. Since it is imprinted on the photographic film at various intervals, unnecessary unexposed portions are generated between the photographing screens of different sizes. Therefore, when this photographic film is used in the above-mentioned camera, there arises a problem that utilization efficiency is deteriorated.

According to the present invention, a photographic film in which a perforation for positioning is formed at a ratio of one on each of the standard photographing screen and the trimming photographing screen so that the film feeding amount corresponding to each photographing screen can be changed,
Another object of the present invention is to provide a camera in which the unexposed portions between the photographing screens are reduced so that photographing screens of different sizes can be projected on the photo film in the film feeding direction.

[0007]

In order to achieve the above object, in the invention according to claim 1, a standard photographing screen perforation and a trimming photographing screen perforation are provided along a side edge portion of the photographic film and along the longitudinal direction. Are formed respectively. Further, in the invention of claim 2, the standard photographing screen perforation and the trimming photographing screen perforation are composed of a pair of perforations for decelerating the film feeding speed and for stopping the film feeding.

According to another aspect of the present invention, there is provided a photographing mode switching means for changing the exposure aperture size to a standard screen size or a trimming screen size, a standard signal when a standard screen perforation is detected, and a trimming photographing screen. When the perforation is detected, the film feeding position detecting means that outputs the trimming signal respectively, and when the standard signal is output when the exposure opening size is the standard screen size, the frame feed for the standard shooting screen is performed, Further, when the exposure aperture size is the trimming screen size, when the trimming signal is output, the film feeding means for feeding the trimming photographing screen frame by frame is provided.

[0009]

FIG. 1 shows a first embodiment of a photographic film of the present invention extracted from a photographic film cartridge. The photographic film cartridge 2 comprises a resin cartridge main body 3, a spool 4 rotatably housed in the resin main body 3, and a photographic film 5 having an end fixed to the spool 4. A locking perforation 6 consisting of four perforations 6a to 6d, which are locked to the winding shaft of the camera, is provided at the front end of the photo film 5, and three at the end thereof are positions showing the final frame. Final frame perforation 7 consisting of perforations 7a to 7c
Are formed respectively.

In the middle portion of the photographic film 5, one 35 mm full size photographed frame (hereinafter simply referred to as a standard frame) 8 is provided.
Positioning perforations (hereinafter referred to as standard frame perforations) 9 are formed at the upper end portion at a rate of each piece. The standard frame 8 corresponds to the standard frame perforation 9 and is imprinted at a predetermined interval as shown by a chain line in the figure. The standard frame perforation 9 is composed of a pair of perforations 9a and 9b, and is used to detect the position of the photographic film 5 when the film is advanced one frame after the standard frame 8 is photographed.

On the other hand, at the lower edge of the photographic film 5, one per photographing frame (hereinafter, simply referred to as trimming frame) 11 having the trimming screen size shown in FIG. A trimming frame perforation) 10 is formed. This trimming frame perforation 10 is
It is composed of a pair of perforations 10a and 10b, and is used for detecting the position of the photographic film 5 when the film is advanced one frame after the trimming frame 11 is photographed. The interval between the trimming frame perforations 10 is half the interval between the standard frame perforations 9.

This photo film cartridge 2 can be operated like a cassette when the film is loaded into the camera.
Even when not in use, attach the tip of the photographic film 5 to the cartridge body 3
It is stored inside and the tip of the photographic film 5 is sent out of the cartridge main body 3 by the rotation of the spool 4. For this reason, on the inner wall of the cartridge body 3, there are ribs for preventing the photographic film 5 from being loosened, and a photographic film 5
Is formed with a tip separation claw or the like for picking up the tip of the film roll from the film roll and sending it toward the film delivery port.

In FIG. 3, which is a rear view of the camera of the present invention using the above-described photographic film cartridge, a release button 21 and an opening / closing cartridge loading lid 22 are provided above the camera 20. A lid opening knob 23 is provided on the side surface of the camera 20, and when the lid opening knob 23 is operated, the hook 24 is disengaged and the cartridge loading lid 23 is opened. As a result, a cartridge storage chamber 25 in which the photographic film cartridge 2 is loaded is exposed above the camera 20. This Patrone room 25
A switch for detecting loading of the photographic film cartridge 2 and a fork (see FIG. 5) engaging with the spool 4 are provided inside.

Further, a finder eyepiece opening 26 and a mode switching knob 27 are provided on the rear side of the camera 20. When the mode switching knob 27 is moved to the “N” (standard) position, the shooting mode of the camera 20 is set to the standard shooting mode, or when it is moved to the “T” (trimming) position, the trimming shooting mode is set. Switch. In the standard shooting mode, the exposure range of the camera is the size corresponding to the standard frame 8, and in the trimming shooting mode, the exposure range is the size corresponding to the trimming frame 11.

FIG. 4 shows a mode switching mechanism for varying the exposure range of the camera. This mode switching mechanism 3
0 is slidable vertically or horizontally,
It is composed of a pair of light shielding pieces 31 to 34 facing each other. One ends of the light shielding pieces 31 and 32 are fixed to a belt 36 driven by a motor 35 as shown in the figure. The rotation direction and rotation amount of the motor 35 are controlled by a control unit (not shown). For example, when the trimming photographing mode is selected,
Rotate in the direction of the arrow to move the light-shielding pieces 31 and 32 from the position shown in the figure to the position indicated by the alternate long and two short dashes line so that the light-shielding pieces 31 and 32 are pushed out into the exposure opening (see FIG. 5) formed in the exposure frame, and the standard photography When switched to the mode, the light shielding pieces 31 and 32 are rotated in the direction of the arrow to move the light shielding pieces 31 and 32 from the position indicated by the chain double-dashed line to the position shown in the drawing, and retracted from the exposure opening.

The shading pieces 33, 34 are also moved by a motor (not shown) in the same manner as the shading pieces 31, 32. As a result, the aperture size for exposure is changed, and each of the light shielding pieces 31 to 31 is changed.
When 34 is in the position shown in the figure, the exposure range is the size of the standard frame 8. Further, when each of the light shielding pieces 31 to 34 is at the position indicated by the alternate long and short dash line, the exposure range is the trimming frame 11
It becomes the size of.

FIG. 5 shows a film feeding mechanism of the camera of the present invention. The fork 40 described above is rotated in both directions by a motor 42 via a feed transmission device 41,
For example, the tip of the photographic film 5 is fed out from the cartridge main body 3 when rotated in the forward direction, and the photographic film 5 is wound into the cartridge body 3 when rotated in the reverse direction. The motor 42 is provided inside the film take-up shaft 43, and the film take-up shaft 43 also rotates via the feed transmission device 41. Further, the motor 42 is a motor driver 44.
It is connected to the microcomputer 45 via.
The microcomputer 45 includes signal generators 46, 4
The mode switching knob 27, the switch 48 that is turned on and off by the cartridge loading lid 22, and the like are connected via 7 to control the camera 20.

Between the fork 40 and the film winding shaft 43, the exposure opening 50 for exposing the photographic film 5 in a standard frame size is provided as shown by a broken line in the drawing. The two-dot chain line inside the exposure opening 50 indicates the exposure opening 5 formed by the light shielding pieces 31 to 34 described above.
1 is shown. A reflection type photosensor 52 is provided in the vicinity of the upper right corner of the exposure opening 50, and a photosensor 5 of the same type is provided under the lower right corner of the exposure opening 51.
3 are arranged respectively. Each of these photo sensors 5
Reference numerals 2 and 53 photoelectrically detect each perforation and send detection signals to the microcomputer 45.

The operation of the photographic film and camera of the present invention constructed as above will be described with reference to FIGS. When the photographic film cartridge 2 is fitted into the cartridge storage chamber 25 and the cartridge loading lid 22 is closed, the switch 48 is turned on and the signal generator 47 outputs a cartridge loading completion signal to the microcomputer 45. The microcomputer 45 drives the photo sensor 52 and rotates the fork 40 forward via the motor 42.
Rotate the spool 4. By the rotation of the spool 4, the tip of the photographic film 5 is sent out of the cartridge body 5,
The film is fed toward the film winding shaft 43.

When the photo sensor 52 detects the locking perforation 6 and four detection signals corresponding to the perforations 6a to 6d are sent, the microcomputer 45 reads the signal from the signal generator 46 and takes a picture. Check the mode. Since the camera 20 shown in FIG. 3 is in the standard photographing mode, the microcomputer 45 continues to drive the photosensor 52. In the trimming shooting mode, the microcomputer 45
Stops driving the photo sensor 52, and the photo sensor 53
To drive.

When the tip of the photographic film 5 reaches the rotating film winding shaft 43, the photographic film 5 is wound around the film winding shaft 43 by a guide plate or the like.
After that, the film is wound by the film winding shaft 43. Then, when the photo sensor 52 detects the standard frame perforation 9 and outputs a detection signal corresponding to the perforation 9a (hereinafter, simply referred to as a first detection signal), the microcomputer 45
Reduces the rotation of the motor 42 to reduce the film winding speed. Further, when the photo sensor 52 outputs a detection signal corresponding to the perforation 9b (hereinafter, simply referred to as a second detection signal), the microcomputer 45 stops the motor 42 and stops film winding. In this way, the first frame of the standard frame 8 is set in the exposure opening 50, and the preparation for shooting in the standard shooting mode is completed.

When the release button 21 is pressed in this state, the light from the subject is exposed on the photographic film 5 through the exposure opening 50. After the exposure is completed, when the exposure completion signal is input to the microcomputer 45, the microcomputer 45 drives the photo sensor 52 and rotates the motor 42. When the motor 42 rotates, film winding is started via the film winding shaft 43. When the photo sensor 52 detects the standard frame perforation 9 after a certain period of time and outputs the first detection signal, the microcomputer 45 causes the motor 4 to move.
Slow the rotation of 2 to reduce the film winding speed. Further, when the photo sensor 52 outputs the second detection signal,
The microcomputer 45 stops the motor 42 and stops film winding. As a result, the exposure opening 50
Is set to the second frame of the standard frame 8. After that, the driving of the photosensor 52 is stopped, and the single frame film feeding for the standard frame is completed.

Thereafter, when the mode switching knob 27 is moved from the "N" position to the "T" position to set the shooting mode to the trimming shooting mode, the signal generator 46 sends a mode switching signal to the microcomputer 45. Thereby, the microcomputer 45 causes the mode switching mechanism 30 to operate.
Drive the exposure range from the size of the exposure opening 50 to the size of the exposure opening 51, and
Drive 2, 53. At this time, since the trimming frame perforation 10 does not face the photo sensor 53, the photo sensor 53 does not output a detection signal.
At this time, the microcomputer 45 rotates the motor 42 to reverse the fork 40 and rewind the photographic film 5.

When the photo film 5 is rewound and the photo sensor 53 detects the trimming frame perforation 10 and outputs a detection signal corresponding to the perforation 10b, the microcomputer 45 causes the motor 42 to operate.
Slows down the rotation and slows down the rewind speed. Further, when the photo sensor 53 outputs a detection signal corresponding to the perforation 10a, the microcomputer 45 causes the motor 4 to operate.
2 to stop the film rewinding. As a result, if the trimming frame 11 is printed in the exposure opening 51, for example, the standard frame 8a shown in FIG.
c is set. After that, the driving of the photosensors 52 and 53 is stopped, and the trimming photographing preparation is completed. Then, when the release button 21 is pressed, the light from the subject is exposed on the trimming frame 11c.

After the exposure is completed, when the exposure completion signal is input to the microcomputer 45, the microcomputer 4
Reference numeral 5 drives the photosensors 52 and 53, and rotates the film winding shaft 43 to start film winding. When the photo sensor 53 detects the trimming frame perforation 10 after a certain period of time and outputs a detection signal corresponding to the perforation 10a, the microcomputer 45 delays the rotation of the motor 42,
Decrease the film winding speed. Further photo sensor 53
Outputs a detection signal corresponding to the perforation 10b, the microcomputer 45 stops the motor 42 and stops film winding. As a result, the trimming piece 11d is set in the exposure opening 51. After that, the driving of the photosensors 52 and 53 is stopped, and the film one frame feeding for the trimming frame is completed. When the release button 21 is pressed in this state, the light from the subject is exposed on the trimming frame 11d.

When shooting is performed again in the standard shooting mode, the mode switching knob 27 is moved from the "T" position to the "N" position. As a result, a mode switching signal is sent from the signal generator 46 to the microcomputer 45.
The microcomputer 45 drives the mode switching mechanism 30 to switch the exposure range from the size of the exposure opening 51 to the size of the exposure opening 50, and the photo sensor 5
Drive 2 At this time, since the standard frame perforation 9 does not face the photo sensor 52, the photo sensor 52 does not output a detection signal. At this time, the microcomputer 45 rotates the motor 42 and the film winding shaft 43 to wind up the photographic film 5.

When the photo film 5 is wound up and the photo sensor 52 detects the standard frame perforation 9 and outputs the first detection signal, the microcomputer 45 reduces the rewinding speed. Further photo sensor 5
When 2 outputs the second detection signal, the microcomputer 45 stops the motor 42 and stops film winding. As a result, the standard frame 8c is placed in the exposure opening 50.
Will be set. After this, the photo sensor 52
Is stopped, the film for standard frames is advanced by one frame, and the preparation for the next shooting is completed. Then, when the release button 21 is pressed, the light from the subject is exposed on the standard frame 8c.

After the exposure is completed, when the exposure completion signal is sent to the microcomputer 45, the microcomputer 4
Reference numeral 5 drives the motor 42 and the photosensor 52 to feed the standard frame film by one frame, and sets the standard frame 8d in the exposure opening 50. In this way, the standard frame 8a and the trimming frames 11c and 11 are added to the photographic film 5.
d and the standard frame 8c are sequentially printed without overlapping. Also, the standard frame 8a and the trimming frames 11c and 11
The frame intervals of the standard frame 8c and the standard frame 8c are set to predetermined intervals as shown in the drawing, and a large unexposed portion does not occur in the photographic film 5, so that the photographic film 5 can be efficiently used.

When the trimming shooting mode is switched to the standard shooting mode, if the previously shot shooting frame is located on the right side of the standard frame 8 (the leading end side in the feeding direction), for example, the trimming frame 11c In this case, the part of the trimming frame 11d becomes an unexposed part. Further, in the photographic film 5 of the present invention, the standard frame perforation 9 and the trimming frame perforation 10 are composed of a pair of perforations for decelerating the feeding speed and stopping the feeding. Transmission control can be performed.

By the way, when the trimming photographing mode is switched to the standard photographing mode and the standard frame 8c is set in the exposure opening 50, the mode switching knob 27 is operated again to take the trimming photographing mode without photographing. 8, the microcomputer 45 drives the mode switching mechanism 30 to change the exposure range to the exposure opening 5
The size of 0 is changed to the size of the exposure opening 51, and the photo sensor 53 is driven. After this, the motor 4
When the fork 40 is rotated reversely by rotating the fork 2, the photographic film 5 is rewound. When the photo sensor 53 detects the trimming frame perforation 10, the microcomputer 45 stops the film rewinding.
Before the film rewinding is stopped, the rewinding speed is reduced as described above. In this way, the trimming piece 11e is set in the exposure opening 51.

When the standard photographing mode is switched to the trimming photographing mode and the trimming frame 11c is set in the exposure opening 51, the mode switching knob 27 is operated again without photographing and the standard photographing mode is set. Is
The microcomputer 45 drives the mode switching mechanism 30 to switch the exposure range from the size of the exposure opening 51 to the size of the exposure opening 50, and the photo sensor 5
Drive 2 Thereafter, when the motor 42 is rotated and the film rewinding shaft 43 is rotated, the photographic film 5 is wound up. When the photo sensor 52 detects the standard frame perforation 9, the microcomputer 45 stops the film winding. As a result, the standard frame 8b before switching to the standard shooting mode is set in the exposure opening 50.

When the photographing is repeatedly performed as described above and the exposure of the final frame is completed, the microcomputer 45 drives the photosensors 52 and 53 and rotates the film winding shaft 43 to start film winding. . At this time, the perforation 7 of the last frame perforation 7 immediately after the photo sensor 52 starts winding.
c is detected and a detection signal is sent to the microcomputer 45. As a result, the microcomputer 45 determines that the last exposure has been performed on the last frame, and the motor 4
2 Driving is stopped and winding is stopped. After that, the microcomputer 45 rotates the motor 42 in the opposite direction, reverses the fork 40 to rewind, and the photographic film 5 is rewound.
The tip of the is wound inside the Patrone body 3.

In the above embodiment, the pair of photosensors 52 and 53 detect the standard frame perforation 9 and the trimming frame perforation 10. However, when the position of the photosensor is moved according to the exposure mode. Can detect the standard frame perforation 9 and the trimming frame perforation 10 with a single photosensor.

FIG. 9 shows a second embodiment of the photographic film of the present invention. In order to reduce the number of perforations, this photographic film 60 has a perforation 1 for trimming frames of the photographic film 5 shown in FIG.
From 0, the trimming frame perforation 61 is formed by thinning out the perforations 10a and 10b at positions facing the standard frame perforation 9. In this photo film 60, when the film for the trimming frame is advanced by one frame, the perforation for the trimming frame 61 and the perforation for the standard frame 9
And are used. Therefore, using the photographic film 60,
When carrying out the film one frame feed for the trimming frame and the film one frame feed for the standard frame, it is necessary to provide another photo sensor in addition to the photo sensors 52 and 53. This photo sensor has an opening for exposure. It is arranged so as to sandwich 50 and to face the photo sensor 53.

FIG. 10 shows a third embodiment of the photographic film of the present invention. In order to further reduce the number of perforations, this photographic film 65 has the trimming frame perforations 10 shown in FIG. 2 formed along the upper side, and the perforations are removed from the lower side of the photographic film 65. Since this trimming frame perforation 10 includes the standard frame perforation 9, in this photo film 65, one trimming frame perforation 10 is used to feed the trimming frame film by one frame. Film per-frame feed is performed with two trimming frame perforations 10. Therefore, in a camera that uses the photographic film 65 to feed the film for trimming frames one frame and the film for standard frames one frame, it is necessary to move the position of the photo sensor 53 to the opposite side of the exposure opening 50. is there.

11 to 13 show fourth to sixth embodiments of the photographic film of the present invention used in a camera in which the trimming frame size is 2/3 (area ratio) of the standard frame size. A photographic film 70 shown in FIG. 11 is a modification of the first embodiment, in which the standard frame perforation 9 is on the upper side and the trimming frame perforation 71 is on the lower side.
Are formed respectively. The pitch of the trimming frame perforation 71 is set to 2/3 of the pitch of the standard frame perforation 9.

A photographic film 75 shown in FIG. 12 is a modified example of the second embodiment, in which the standard frame perforation 9 is on the upper side and the trimming frame perforation 7 is on the lower side.
6 are formed respectively. The trimming frame perforation 76 is located at a position facing the standard frame perforation 9 from the trimming frame perforation 71 shown in FIG.
a and 71b are thinned out.

A photographic film 80 shown in FIG. 13 is a modification of the second embodiment, and has a standard frame perforation 9 and a trimming frame perforation 76 shown in FIG. 12 formed on the upper side.

[0039]

As described above, according to the first aspect of the invention, the standard photographing screen perforations and the trimming photographing screen perforations are formed at the side edges of the photographic film and along the longitudinal direction. When the standard shooting screen or the trimming shooting screen is imprinted, the amount of film advance by one frame can be changed corresponding to each shooting screen, and the use efficiency can be improved.

According to the second aspect of the present invention, the perforation for the standard photographing screen and the perforation for the trimming photographing screen are composed of a pair of perforations for decelerating the film feeding speed and for stopping the film feeding. Since it is stopped after slowing down, the photo film can be stopped at the correct position.

According to a third aspect of the present invention, there is provided shooting mode switching means for changing the exposure aperture size to the standard screen size or the trimming screen size, and a standard signal when the standard screen perforation is detected, and a trimming shooting screen. When the perforation is detected, the film feeding position detecting means that outputs the trimming signal respectively, and when the standard signal is output when the exposure opening size is the standard screen size, the frame feed for the standard shooting screen is performed, Further, when the trimming signal is output when the exposure opening size is the trimming screen size, the film feeding means for feeding the trimming photographing screen by the frame is provided. Therefore, the film one frame feeding after the photographing is performed. The amount of data sent can correspond to each shooting screen. Reduce the unexposed portions between screens, it is possible to enhance the utilization efficiency of the photo film.

[Brief description of drawings]

FIG. 1 is a view showing a photographic film of the present invention pulled out from a photographic film cartridge.

FIG. 2 is an enlarged view showing a photographic film of the present invention in which a standard frame and a trimming frame are imprinted.

FIG. 3 is a perspective view of a camera of the present invention using the photographic film cartridge shown in FIG.

FIG. 4 is a perspective view showing an example of a mode switching mechanism used in the camera of the present invention.

FIG. 5 is a schematic view showing a film feeding mechanism of the camera of the present invention.

FIG. 6 is a flow chart showing initial film feeding performed by the camera of the present invention.

FIG. 7 is a flow chart showing one frame advance of a film performed by the camera of the present invention.

FIG. 8 is a flowchart showing a process performed by the camera of the present invention when switching modes.

FIG. 9 is a view showing a second embodiment of the photographic film of the present invention.

FIG. 10 is a view showing a third embodiment of the photographic film of the present invention.

FIG. 11 is a view showing a fourth embodiment of the photographic film of the present invention.

FIG. 12 is a view showing a fifth embodiment of the photographic film of the present invention.

FIG. 13 is a view showing a sixth embodiment of the photographic film of the present invention.

FIG. 14 is a view showing a conventional photographic film drawn from a photographic film cartridge.

[Explanation of symbols]

 2 Photo film Patrone 5 Photo film 8 Standard frame 9 Standard frame perforation 10 Trimming frame perforation 11 Trimming frame 20 Camera 22 Patrone loading lid 27 Mode switching knob 30 Mode switching mechanism 31-34 Shading piece 42 Motor 43 Film winding shaft 50 , 51 Exposure aperture 52, 53 Photo sensor

Claims (3)

[Claims] 1. A standard shooting screen perforation provided for frame-by-frame advance of a standard size shooting screen and a frame-by-frame advance for trimming shooting screen of a size different from the standard size. A photographic film characterized in that a perforation for a trimming photographing screen is formed on the side edge portion of the photographic film and along the longitudinal direction. 2. The standard photographing screen perforation and the trimming photographing screen perforation are:
2. The photographic film according to claim 1, wherein the photographic film comprises a pair of perforations for decelerating the film feeding speed and for stopping the film feeding. 3. A camera for capturing a standard or trimming screen size of a photographing screen on a photographic film having a standard screen perforation and a trimming photographing screen perforation by changing the exposure aperture size. Shooting mode switching means for varying the aperture size for standard screen size or trimming screen size, and a standard signal when the standard screen perforation is detected, and a trimming signal when the trimming shooting screen perforation is detected When the standard feed signal is output when the exposure opening size is the standard screen size, the frame feed for the standard shooting screen is performed, and when the exposure opening size is the trimming screen size. The trimming signal is When it is force, a camera which is characterized in that a film feed means for performing the frame advance of the trimming photographing screen.