Camera having adjustable aperture

Details Camera having adjustable aperture Camera having adjustable aperture

1997-11-12

1998-07-28

Mathews, A. A.

Photography

Camera detail

Film restraining means or pressure plate

396440, 396539, G03B 1700

Patent

active

057873186

ABSTRACT:
A camera in which lenses in a lens system can be easily adjusted and manufacturing steps can be eliminated. The camera is equipped with an aperture which regulates the exposure region of a film, and a pressure plate with a tool insertion aperture hole formed in a region opposite the aperture. The tool insertion hole is disposed at the back surface of the aperture. This tool insertion hole allows for easy and efficient adjustment of the lenses making up the camera's lens system. Usually, the lens system is a zoom lens system.

REFERENCES:
patent: 3103861 (1963-09-01), Koeppe
patent: 4364653 (1982-12-01), Terada

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