Photographic camera with exposure size corrected for position of exit pupil of taking lens

A variable-exposure-size camera has an aperture member which defines an aperture through which a photographic film positioned behind the aperture member is exposed to light passing through a taking lens, and a pair of mask members which are disposed between the aperture member and the taking lens an...

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Bibliographic Details
Main Authors KIMURA; TSUTOMU, HIRAI; MASAYOSHI, KUBO; TAKASHI, SHIRANE; HIDETO
Format Patent
LanguageEnglish
Published 23.09.1997
Edition6
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:A variable-exposure-size camera has an aperture member which defines an aperture through which a photographic film positioned behind the aperture member is exposed to light passing through a taking lens, and a pair of mask members which are disposed between the aperture member and the taking lens and are moved up and down toward and away from each other to change the effective upper and lower edges of the aperture, thereby narrowing the effective opening area of the aperture. The lower edge portion of the upper mask member and the upper edge portion of the lower mask member are bent toward the film surface so that the extreme edges of the edge portions which respectively define the upper and lower edges of the effective opening area of the aperture are positioned near the film surface.
Bibliography:Application Number: US19960767035