Camera permitting change-over of photographic image plane frame

Details Camera permitting change-over of photographic image plane frame Camera permitting change-over of photographic image plane frame

1995-11-08

1997-03-11

Blankenship, Howard B.

Photography

Single lens reflex camera

Having shutter and additional means to block light from film

396436, G03B 1912

Patent

active

056106769

ABSTRACT:
In a single-lens reflex camera having a quick-return mirror and a built-in mechanism for change-over between different photographic image plane frames, a light blocking member is arranged to be movable into or out of a photo-taking optical path by swinging around the same or approximately the same rotation axis of the quick-return mirror and to block a part of a photographing light flux to prevent the part of the light flux from reaching the photographic image plane when it is within the photo-taking optical path, so that a photographic image plane frame which differs from a normal photographic image plane frame can be formed by this light blocking member.

REFERENCES:
patent: 3027819 (1962-04-01), Reiche et al.

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