JPH05281596A - Special size frame photographing finder visual field - Google Patents

Abstract

PURPOSE:To enable ease discrimination between a panorama hotographing mode and a normal photographing mode because specifying masks inserted into a finder visual field frame are semi-transparent, and to enable the observation of also a photographic scene outside the panorama visual field frame by the semi-transparent specifying masks so as to allow the composition at the panorame photographing time to be easily determined. CONSTITUTION:A finder visual field 10 is provided movably with a pair of visual field frame specifying masks 11, 12. These specifying masks 11, 12 are formed of semi-transparent films. A switching lever 20 is engaged with these specifying masks 11, 12 so as to switch a mask opening part 16 in correspondence with the photographing frame size. The visual field frame specifying masks 11, 12 are further provided with parallel index marks 27, 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder field device for photographing special size frames, and more specifically, it is best used for a camera capable of selectively photographing different sizes, for example, panorama size frames and normal size frames. The present invention relates to a finder field device for special size frame shooting.

[0002]

2. Description of the Related Art Demand for panoramic size prints has been expanding recently because the length in the horizontal direction is twice as large as the size of full size prints (L size or E size) and it is quite powerful. This panorama print picture is
A panorama size frame (13 × 36 mm) recorded on a 35 mm photographic film is printed on photographic paper with a print size of 89 × 254 mm, for example.

In order to shoot a shooting scene in a panorama size frame, a frame size variable camera is used in addition to a film unit with a lens for panorama and a compact camera for panorama. In this frame size variable camera, a frame size switching operation knob is arranged on the film passage so that the frame size cannot be changed during the shooting of one photo film. In addition, recently, a frame size switching camera has been provided with a frame size switching operation knob on the outside of the camera so that it is possible to freely switch between full size frames and panorama size frames during the shooting of one photo film. It is commercially available.

[0004]

The panoramic shooting finder used in these variable frame size cameras or switched frame size cameras has a boundary line indicating the panoramic shooting range on the surface of the reticle. Therefore, since the boundary line looks like the AF target mark or the short-distance correction field frame, it is difficult to understand, and depending on the lighting condition, the visibility is remarkably reduced. Furthermore, since the boundary line showing the panoramic shooting range and the short-distance correction visual field frame look the same, it is difficult to distinguish between the normal shooting mode and the panoramic shooting mode only by looking through the viewfinder.

On the other hand, at the time of panoramic photography, there is a method of hiding the top and bottom by inserting a light-shielding plate in the viewfinder field. In this case, although the visibility is improved, the field of view becomes long and slender, which gives a feeling of oppression. There is a problem of giving it to the photographer. Also, because you can see only a narrow range, you can move the camera when setting the shooting area and deciding the composition,
You need to take your eyes off the viewfinder. Furthermore,
With a conventional viewfinder, it is difficult to shoot a long and narrow subject in the shooting scene in parallel with its long side. Therefore, the slender subject is recorded in a tilted state in the shooting scene, which makes the print unsightly. There was an inconvenience.

The present invention has been made to solve the above problems, and improves the visibility of the visual field frame when photographing a special size frame such as a panoramic frame and facilitates the determination of the composition. It is an object of the present invention to provide a finder field device for special-size frame shooting capable of performing the above. Further, the present invention provides a viewfinder device for special size frame shooting, which is capable of shooting a long and narrow object in a state parallel to the long side of the shooting screen when shooting a special size frame such as panoramic shooting. The purpose is to

[0007]

In order to achieve the above object, the present invention provides a visual field frame defining member for defining a visual field frame of a special size frame and a special visual field frame defining member made of a semi-transparent material. A viewfinder field device for special size frame shooting is constructed by a field view frame switching means that is inserted into the viewfinder field frame during shooting of size frames and is retracted from the viewfinder field frame during normal shooting.

According to a second aspect of the present invention, there is provided a finder field device for special size frame photography according to the above invention.
The visual field frame defining member is provided with a parallel index mark indicating parallel to the long side of the frame size visual field of the special size frame.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing a finder field device for panoramic photography embodying the present invention. A known AF target mark 10a and a short-distance correction visual field frame 10b are provided in the finder visual field 10. In the finder field 10, a pair of field frame defining masks 11 and 12 are movably arranged in parallel on a plane orthogonal to the finder optical axis.
Is provided. These field frame defining masks 11 and 12
Is substantially L-shaped and is composed of a semi-transmissive film. The semi-transmissive film has any color such as red, blue and yellow and is semi-transparent.

The pair of field frame defining masks 11 and 12 include
Guide holes 13 and 14 formed of elongated holes are formed, and guide pins 15 are inserted into the guide holes 13 and 14. The guide pin 15 is provided parallel to the optical axis of the finder, and a pair of field frame defining masks 11 and 12 are provided on the guide pin 15.
Is set, the rectangular frame-shaped mask opening 16 is formed. This mask opening 16 is, as shown in FIG.
It becomes maximum when the pair of field frame defining masks 11 and 12 are opened apart from each other, and at this time, the mask opening 16 is 3
It becomes a finder field frame equivalent to a full-size screen of 5 mm film. Also, a pair of field frame defining masks 11, 1
As shown in FIG. 1, the mask opening 16 becomes a viewfinder field frame corresponding to the panorama size screen when the guide hole 13 is located at the moving end of the guide hole 13 as shown in FIG.

Thus, the pair of field frame defining masks 1
A mask switching lever 20 is provided to change the mask openings 16 of 1 and 12. The mask switching lever 20 is rotatably attached to the machine frame of the finder device near its center by a mounting shaft 21. Engaging pins 22 and 23 are provided on the mask switching lever 20 so as to project therefrom, and these engaging pins 22 and 23 are inserted into the oblong holes 25 and 26 for switching of the field frame defining masks 11 and 12, respectively. There is. Therefore, in FIG. 1, when the operation end portion 20a of the switching lever 20 is moved rightward, the panoramic size field frame is switched to the normal size field frame as shown in FIG. Further, from the state of FIG.
When the operation end portion 20a of is moved to the left, the normal size field frame is switched to the panoramic size field frame.

The short side mask portions 11a, 12a of the pair of field frame defining masks 11, 12 have parallel index marks 27, 28 for indicating the vertical center of the field frames when they become panorama size field frames. Is provided. The parallel index marks 27 and 28 are formed by protruding a part of the mask portions 11a and 12a in a triangular shape. The parallel index marks 27 and 28 enter the panoramic shooting field frame during panoramic shooting and serve as parallel indexes. Further, when shooting a normal frame, the viewfinder field frame 10 is retracted.

Next, the operation of this embodiment will be described. When shooting a normal frame, the mask switching lever 20 is set to the left as shown in FIG.
The pair of field frame defining masks 11 and 12 are in a state of being retracted from the finder field frame 10. For this reason, since a boundary line defining the panoramic field frame does not appear in the viewfinder field frame 10 unlike the conventional case, when photographing a normal size frame, the composition can be easily performed with the same feeling as a normal camera. Can be determined. An example of the viewfinder field frame at this time is shown in FIG.

When switching the frame size, a frame size switching switch (not shown) of the camera is operated.
As a result, the mask switching lever 20 is rotated counterclockwise in the figure by the driving means such as a solenoid, and the pair of field frame defining masks 11 and 12 are moved in the closing direction by the guide of the guide pin 15. As a result, the field frame defining masks 11 and 12 enter the finder field frame 10,
This switches to the viewfinder frame corresponding to the panorama size. Also, in conjunction with this, the photographing mechanism and aperture mechanism of the camera are switched, and the entire camera is set to the panoramic photographing mode. An example of the viewfinder field frame at this time is shown in FIG. Since the stipulated masks 11 and 12 are made of a semi-transmissive member, the photographic scene can be observed through them even in the state of the panoramic size field frame, which facilitates the determination of the composition during panoramic photography. Also, for panoramic shooting, the viewfinder field frame 1
Since the upper and lower sides of 0 are covered with the field-frame defining masks 11 and 12, the portions covered with these are in a semi-transmissive state with a slight density. Therefore, it is possible to easily confirm that the camera is in the panoramic shooting state, and it is possible to prevent an operation error such as accidentally shooting with a different frame size.

Next, another embodiment of the present invention will be described. In the case of this embodiment, as shown in FIG. 5, a visual field frame defining mask 41 having a mask opening 40 of a panoramic size visual field frame is provided, and this is freely rotatable by a mounting shaft 42 in the machine frame of the viewfinder visual field device. Attach to. The field frame defining mask 41 is made of a semi-transmissive material as in the above-described embodiment. Further, a parallel index mark 43 is provided at the center of the short side of the mask opening 40. As a result, it is possible to shoot a long and narrow subject in a state of being parallel to the long side of the screen at the time of shooting, and it is possible to eliminate the inconvenience that a long and narrow subject is obliquely shot in the screen as in the conventional case.

In the above embodiment, the parallel index mark 43 is formed by projecting a part of the short side member in a triangular shape. However, in addition to this, as shown in FIG. 6, in the mask opening 50,
It may be configured by adhering an all-transparent film 52 on which the parallel index mark 51 is recorded. In this case, as shown in FIG. 6A, the parallel index mark 51 is constituted by a plurality of short thin lines 53 having a predetermined pitch. Instead of the short thin line 53, a plurality of thin lines 54 parallel to the entire mask opening 50 may be recorded as shown in FIG. Further, as shown in FIG. 7C, a fine line 55 may be recorded in a cross shape on the total transmission film 52.

In the above embodiment, the case has been described in which full-size frames and panorama-size frames are switched for shooting, but the frame size is not limited to this. For example, in addition to full-size frames, it can be performed when switching between high-definition size, cinema size, square size, and other frames having an aspect ratio of 1: 1.7 and normal full-size frames. In this case, the mask opening of each field frame defining mask is set according to these special size frames.

[0018]

As described above, according to the present invention,
Since the panoramic field-of-view frame defining member that defines the field-of-view frame of the special size frame is made of semi-transmissive material, the panoramic shooting is performed because the field-of-view frame defining member inserted in the viewfinder field frame is confirmed in semi-transparent state during panoramic shooting. You can easily check the mode or normal shooting mode. In addition, since it is in the semi-transmissive state, it is possible to observe a shooting scene outside the panoramic field of view frame, so that the composition during panoramic shooting can be easily determined.

Further, since the parallel index mark is provided on the visual field frame defining member, when a long and narrow object is photographed, the long and narrow object is aligned with the parallel index mark so that the long side of the photographing screen You can shoot in a state parallel to. This prevents the slender subject from being tilted and photographed within the photographing screen as in the conventional case.

[Brief description of drawings]

FIG. 1 is a front view showing a panoramic shooting state of a viewfinder field apparatus for panoramic size shooting according to the present invention.

FIG. 2 is a front view showing a normal frame size shooting state of the apparatus.

FIG. 3 is an explanatory diagram showing an example of a finder field frame in a normal frame size shooting mode.

FIG. 4 is an explanatory diagram showing an example of a finder field frame in a panoramic shooting mode.

FIG. 5 is a front view showing another embodiment.

FIG. 6 is a front view showing an example of a parallel index mark.

[Explanation of symbols]

 10 viewfinder field frame 11, 12, 41 field frame defining mask 16, 40, 50 mask opening 20 mask switching lever 27, 28, 43, 51 parallel index mark 53, 54, 55 fine line

Claims (2)

[Claims] 1. A field-of-view frame defining member that is made of a semi-transparent material and defines a field-of-view frame of a special-size frame, and this field-frame defining member is inserted into the view-field frame of a special-size frame during normal shooting. A finder field device for special-size frame shooting, which sometimes comprises a field frame switching means for retracting from the finder field frame. 2. The viewfinder field device for special-size frame shooting according to claim 1, wherein the field frame defining member is
A viewfinder field device for shooting special size frames, which is provided with a parallel index mark indicating parallel to the long side of the frame size field of the special size frame.