Exposure control device for camera

Details Exposure control device for camera Exposure control device for camera

1985-06-25

1986-05-20

Perkey, William B.

354236, 354250, 354256, G03B 300, G03B 910, G03B 958

Patent

active

045897484

ABSTRACT:
An exposure control device for use with a camera provided with two objective lenses having different focal length which are selectively used includes two exposure control elements which are disposed in front of and facing to the two objective lenses, respectively, and simultaneously driven by a drive means. One of the lights passed through the respective exposure control elements which is selected by optical path changing means is allowed to reach a film. The exposure control elements are used either diaphragms which usually allow the admittance of light into the objective lenses or shutters which are usually forced to be in positions where intercepting the optical paths of the objective lenses.

REFERENCES:
patent: 3405624 (1968-10-01), Peterson
patent: 3443499 (1969-05-01), Gianino
patent: 3774512 (1973-11-01), Seiden et al.
patent: 3796485 (1974-03-01), Seiden
patent: 4140381 (1979-02-01), Douglas

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