JPH086207A - Photographic film and camera - Google Patents

Abstract

PURPOSE:To provide a photographic film capable of discriminating whether it is the photographic film having an exposure area of 1st photographing size and whether it is the photographic film having a 2nd exposure area where other exposure areas are previously exposed and to provide a camera capable of automatically switching a finder visual field frame to discriminated size by discriminating the photographic film. CONSTITUTION:A hole 34 displaying that it is the photographic film dedicated to photographing of P size where the exposure areas 38A and 38B other than the exposure area 36 of P size are previously exposed is bored at the leader part 32 of the photographic film 22 so as to display whether it is the photographic film for N size or the photographic film dedicated to the P size. By providing a sensor 42 detecting the hole 34 in the camera and detecting the hole 34 by the sensor 42, the finder visual field frame is automatically switched for P size by a finder visual field frame switching mechanism 44. The photographic film is discriminated by sticking a discrimination mark 80 displaying the photographic film dedicated to P size to the main body 18A of a film cartridge 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film and a camera, and more particularly to a photographic size switchable camera capable of shooting full size and panoramic size, and a photographic film used in the photographic size switchable camera.

[0002]

2. Description of the Related Art Conventionally, a photographing size switching type camera capable of photographing a full size (hereinafter referred to as "N size") and a panoramic size (hereinafter referred to as "P size") has been disclosed in Japanese Utility Model Publication No. 3-84821. It is known from the publication. In such a shooting size switching type camera, the N size mode or the P size mode is selected by the user before shooting, and either mode is used until one photo film is taken. . That is,
For example, when the P size mode is selected for the camera,
A viewfinder mask having a field frame corresponding to the P size is advanced on the finder optical axis, and an aperture mask is advanced above and below the exposure aperture to match the aspect ratio of the P size mode. When the N size mode is selected, the finder mask is retracted from the optical axis of the finder and the aperture mask is retracted from the exposure aperture. This allows
The aspect ratio can be switched to the N size mode.

Recently, Japanese Patent Laid-Open No. 3-290643
As disclosed in Japanese Patent Laid-Open Publication No. 5-341437 and Japanese Patent Laid-Open Publication No. 5-341437, a film-integrated camera dedicated to panoramic photography has been released. This film integrated camera is
The photographic film is used in which the exposed area of the size is left and the other exposed areas are pre-exposed, and the aperture mask is unnecessary. Further, Japanese Patent Laid-Open No. 3-290643 discloses a film-integrated camera in which mask plates are attached above and below a finder to form a P-size field frame.

[0004]

[Patent Document 1] Japanese Patent Application Laid-Open No. 3-29064
The photographic film disclosed in Japanese Patent Laid-Open No. 3 and Japanese Patent Laid-Open No. 5-341437 is premised to be used in a film-integrated camera as described above. Therefore, when such a photographic film is used for a general camera, the user or the camera cannot distinguish whether the photographic film is for N size or P size, so that the wrong photographic size is used. It has the drawback of taking pictures.

The present invention has been made in view of the above circumstances, and has a photographic film having an exposure area of a first photographing size or a second exposure area in which another exposure area is pre-exposed. It is an object of the present invention to provide a photo film capable of displaying a photo film. Further, the present invention has been made in view of such circumstances, and the first
To provide a camera capable of discriminating between a photographic film having an exposure area of the image pickup size and a photographic film having the second exposure area, and automatically switching the viewfinder frame according to the identified exposure area. With the goal.

[0006]

SUMMARY OF THE INVENTION The present invention provides a photographic film capable of discriminating the film format of a photographic film stored in a container having the same shape, and a finder which recognizes the film format and matches it. In order to provide a camera that automatically switches to the field of view, the photo film reader has a first photo size exposure area or a second photo size exposure area in the photo film reader. It is characterized in that a display means for displaying or is provided.

In order to achieve the above object, the present invention further comprises:
In the camera having a viewfinder capable of shooting in the first shooting size and the second shooting size, and having a viewfinder capable of switching between the first shooting size field of view frame and the second shooting size field of view frame, Detecting a display unit provided on a film or a film cartridge for storing the photographic film and displaying a photographic film having an exposure area of a first shooting size or a photographic film having an exposure area of a second shooting size When the detection means and the display means detected by the detection means indicate a photographic film having an exposure region of the first shooting size, the view frame of the finder is set to the viewing frame for the first shooting size. Switch to the second
In the case of showing the photographic film having the exposure area of the photographing size, the finder visual field frame switching means for switching the visual field frame of the finder to the visual field frame for the second photographing size is provided.

[0008]

The photographic film according to claim 1 is a photographic film having an exposure area of a first photographic size or a photographic film having a second photographic size of the exposure area in the leader portion of the photographic film. Since the display means for displaying is displayed, the photographic film can be identified even when it is stored in the film cartridge.

A camera according to claim 2 is a photographic film,
Alternatively, it has a detection means for detecting the display means provided in the film cartridge for accommodating the photographic film. When the display means detected by the detection means indicates, for example, a photographic film having an exposure area of the first photographing size,
Viewfinder field frame switching means switches the field frame of the viewfinder to the field frame for the first photographing size. Further, when the display means detected by the detection means indicates a photographic film having an exposure area of the second photographing size, the view frame of the finder is taken from the visual field frame for the first photographing size to the second photographing. Switch to the field frame for size. As a result, in the photographing size switching type camera of the present invention, the viewfinder field frame is automatically switched according to the identified exposure area, so that photographing is not performed in an incorrect photographing range.

The photographic film according to claim 3 uses a 35 mm size film as the photographic film, the first photographic size corresponds to a full size, the second photographic size corresponds to the upper part of the first photographic size, The lower part has a shooting size that is partially exposed in advance to reduce the screen size. According to a fourth aspect of the present invention, in the exposure frame of the camera,
It has an opening corresponding to the shooting size of.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a photographic film and a camera according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an explanatory view showing an embodiment of a photographic film and a camera according to the present invention, and is a perspective view of the camera body 12 with a back cover 10 opened, as seen from the back side. A finder 14 is formed substantially in the center of the upper part of the camera body 12, and a shutter release button 16 is arranged at the upper right corner of the camera body 12. Further, inside the camera body 12, a storage chamber 20 for the film cartridge 18 is formed on the left side in the drawing, and a winding chamber 24 for the photographic film 22 is formed on the right side in the drawing.

A film exposure frame 26 is formed between the storage chamber 20 and the winding chamber 24. On both sides of the exposure frame 26, a pair of upper and lower sprockets 28, 28 ...
These sprockets 28, 28 are used for the photographic film 22.
The photo film 22 can be rewound from the film cartridge 18 and conveyed to the take-up chamber 24 by being driven by engaging with the perforations 30, 30 ,.

A hole (display means) 34 is formed in the reader portion 32 of the photographic film 22. As shown in FIG. 2, the photographic film 22 housed in the film cartridge 18 is provided with a photo film 22 in which upper and lower exposure areas 38A and 38B other than the P size exposure area 36 are pre-exposed (for exclusive use in P size photography). It is a hole for displaying that it is a photo film. That is, in the case of a photographic film in which the entire film is unexposed and N size images can be taken, the hole 34 is not provided. Photographic film 2 of this embodiment
No. 2 applies a 35 mm film, and the aspect ratio of P size width and height is 36.4 mm: 13.33 mm (2.7
3: Set to 1). In addition, the aspect ratio of the N-size exposure region 40 shown by the chain double-dashed line in FIG. 2 is 36.4 m.
m: 24.4 mm (1.5: 1).

On the other hand, as shown in FIG. 1, the camera body 12 is provided with a light emitting and receiving sensor 42 (detecting means). The light projecting and receiving sensor 42 is arranged in the vicinity of the exposure frame 26 at a position where the hole 34 of the photographic film 22 passes, and detects the presence or absence of the hole 34 based on the amount of light received and reflected. . Therefore, notches may be formed instead of the holes 34, and a film having a different transmittance from the negative of the photographic film 22 may be attached. When the light emitting and receiving sensor 42 detects the hole 34, the finder field frame switching mechanism built in the camera body 12 is driven.

FIG. 3 is an assembled perspective view showing an embodiment of the finder visual field frame switching mechanism 44, which is applied to the albada type bright frame finder of the finder 14. Albada type bright frame finder 14
Is composed of an objective lens 50 and an eyepiece lens 52. A reflective film is vapor-deposited on the inner side 50A of the objective lens 50 so as to form a semitransparent concave mirror.
A field frame 54 for N size is vapor-deposited on the inner surface 52A of the. Therefore, at the time of shooting for N size, the field frame 54 is illuminated by the light entering from the objective lens 50, reflected by the inner surface 50A of the objective lens 50, and a virtual image of the field frame 54 is formed at a distance. Then, the virtual image of the N size field frame 54 and the image of the subject can be simultaneously observed by the eyepiece lens 52.

A panorama switching mask 56 is provided between the objective lens 50 and the eyepiece lens 52 to provide a viewfinder optical axis 57.
It is arranged so that it can be freely taken in and out. A window 60 having an aspect ratio for P size is formed on the panorama switching mask 56, and this window 60 is visually recognized as a field frame for P size when the panorama switching mask 56 is inserted on the finder optical axis 57. It The panorama switching mask 56 has a support shaft 58.
It is rotatably disposed via A, and when it is rotated clockwise, it is advanced onto the finder optical axis 57 (state of FIG. 3), and when it is rotated counterclockwise,
It is retracted from above the finder optical axis 57.

The panorama switching mask 56 is driven by the finder field frame switching mechanism 44. The finder visual field frame switching mechanism 44 includes a stepping motor 62, a switching lever 64, levers 66 and 68, and the like. The stepping motor 62 has its rotation direction and rotation amount controlled by a pulse train output from the pulse generator 70, and this pulse generator 70 is controlled by the output signal from the above-mentioned light emitting and receiving sensor 42. That is, when the light emitting and receiving sensor 42 detects the hole 34, the stepping motor 62 causes the switching lever 6 to move.
4 is slid from the N size position to the P size position. By the movement of the switching lever 64, the lever 66
Is rotated by a certain amount in the direction of the arrow, and its rotating position is held by the click spring 72. By the rotation of the lever 66, the lever 68 is rotated in the direction of the arrow by the urging force of the spring 74, and by the rotation of the lever 68, the panorama switching mask 56 is urged by the spring 76.
8A is rotated in the direction of the arrow. This allows
The panorama switching mask 56 is advanced on the finder optical axis 57 to switch from the N size field frame to the P size field frame.

Next, the operation of the photographic film and camera constructed as described above will be described. First, as shown in FIG. 2, the photographic film 22 displays on the reader section 32 that the exposure areas 38A and 38B other than the P-size exposure area 36 are pre-exposed and are exclusively for P-size photography. Since the holes 34 are formed, the photo film 22
It is possible to discriminate whether the photo film for N size or the photo film for P size is stored even when the photo film is stored in the film cartridge 18.

Next, the photographing size switching type camera will be described. The film cartridge 18 is attached to the camera body 12
When the light projecting and receiving sensor 42 detects the hole 34 after loading in the storage chamber 20, the panorama switching mask 56 advances onto the finder optical axis 57 by the finder visual field frame switching mechanism 44 as shown in FIG. As a result, in the camera of the present embodiment, the viewfinder frame is automatically switched from the N size to the P size, so that the shooting is not performed in the wrong shooting range.

The viewfinder field frame switching mechanism 44 comprises:
The panorama switching mask 56 is held at the position until the photographing of one film is completed. Also,
The viewfinder field frame switching mechanism 44 is controlled so as to move the panorama switching mask 56 away from the viewfinder optical axis 57 in conjunction with the opening operation of the case back 10. In the above embodiment, the holes 34 are formed in the photographic film 22 to identify the photographic film, but the present invention is not limited to this. For example, as shown by the chain double-dashed line in FIG. 1, an identification mark 80 indicating a P-size photographic film may be attached to the main body 18A of the film cartridge 18 to identify the photographic film. In this case, a sensor 82 for detecting the identification mark 80 is provided in the storage chamber 20 of the camera body 12, and the finder field frame switching mechanism 44 shown in FIG. 3 is driven based on the identification mark detection signal from the sensor 82. Good.

The sensor may detect the identification mark 80 optically or electrically, and the identification mark 8
When a protrusion or the like is formed as 0, the protrusion may be mechanically detected. In the present embodiment, the identification mark is provided only in the case of the P-size photo film, but the present invention is not limited to this, and the identification mark indicating the N-size photo film is used instead of the P-size photo film. May be attached. In addition, the identification mark 8
Instead of 0, a bar code indicating P size only and N size only may be formed. Furthermore, in the present embodiment, the first shooting size is N size and the second shooting size is P size, but the second size may be half size, cinema size, or high definition size. Further, the first and second shooting sizes may be appropriately selected from N size, P size, half size, cinema size, and high definition size.

In this embodiment, the viewfinder field frame switching mechanism 44 for mechanically switching the viewfinder field frame by the panorama switching mask 56 has been described. However, in the case of the electronic viewfinder, the display frame displayed on the liquid crystal display panel is changed. The size may be electrically switched. Further, in the present embodiment, the photographing size switching type camera which does not require the aperture mask has been described, but it may be applied to a camera which drives the aperture mask and switches the exposure area by the exposure aperture.

In this embodiment, the example applied to a camera has been mainly described. However, a simple film type detection mechanism device and a finder visual field switching mechanism are provided in the film integrated camera to manufacture the film integrated camera. The viewfinder field may be automatically switched according to the film type.

[0024]

As described above, according to the photographic film of the present invention, in the leader portion of the photographic film, the photographic film has the exposure area of the first photographic size or the second photographic size. Since the display means for displaying whether or not the photographic film having the exposure area is provided, the photographic film can be easily identified.

Further, according to the photographing size switching type camera of the present invention, it has a detecting means for detecting the display means provided on the photographic film or the film cartridge for accommodating the photographic film, and the detecting means detects the detecting means. When the display means shows a photographic film having an exposure area of the first photographing size, the finder visual field frame switching means switches the visual field frame of the finder to the visual field frame for the first photographing size, and the detecting means detects it. When the display means indicates a photographic film having an exposure area of the second shooting size, the viewfinder frame is switched to the second shooting size of the viewing frame. It will not be done.

When this plan is applied to the film integrated type camera, it is not necessary to separately design and manufacture the full size integrated type integrated camera and the panorama and other non-full size integrated type cameras. Manufacturing in large quantities has the effect of reducing manufacturing costs.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a photographic film and a camera according to the present invention.

FIG. 2 is an explanatory view showing an embodiment of a photographic film according to the present invention.

FIG. 3 is an explanatory diagram showing an embodiment of a viewfinder field frame switching mechanism of a camera according to the present invention.

[Explanation of symbols]

 12 ... Camera body 14 ... Finder 18 ... Film cartridge 22 ... Photo film 34 ... Hole (display means) 36 ... P size exposure area 40 ... N size exposure area 42 ... Light emitting / receiving sensor (detection means) 44 ... View field of view Frame switching mechanism 80 ... Identification mark (display means) 82 ... Sensor (detection means)

Claims (4)

[Claims] 1. A reader unit of a photographic film is provided with display means for displaying whether the photographic film has a first exposure size exposure area or a second exposure size exposure area. Photo film characterized by 2. A camera having a finder capable of shooting in a first shooting size and a second shooting size, and having a viewfinder capable of switching between a field frame for the first shooting size and a field frame for the second shooting size. Where the photographic film or the photographic film having the exposure area of the first photographic size or the photographic film having the exposure area of the second photographic size provided on the photographic film or the film cartridge for accommodating the photographic film is displayed. When the detection means for detecting the display means and the display means detected by the detection means indicate a photographic film having an exposure area of the first photographing size, the field frame of the finder is changed to the first photographing. When switching to the size-specific field frame and showing a photographic film having an exposure area of the second shooting size, the field of view of the viewfinder is changed to the size of the second shooting size. Camera, characterized in that it and a finder field frame switching means for switching the frame. 3. The photographic film is a 35 mm sized film, the first photographic size is equivalent to a full size, and the second photographic size is partially preformed in upper and lower parts of the first photographic size. 3. The photographic film according to claim 1, wherein the screen size is reduced by exposure. 4. The camera according to claim 2, wherein the exposure frame of the camera is an opening corresponding to the first shooting size.