Photographic camera with automatic exposure control

Details Photographic camera with automatic exposure control Photographic camera with automatic exposure control

1976-09-21

1978-10-10

Gellner, Michael L.

354 29, G03B 708

Patent

active

041199782

ABSTRACT:
A photographic camera permits automatic exposure control wherein either the diaphragm aperture setting or the shutter speed setting is preselected while the other is automatically obtained thereafter. Arithmetical operations are electronically performed on various exposure control parameters such as the scene brightness etc., and signals resulting from these operations are used to control the shutter control mechanism or the aperture control mechanism to automatically obtain the shutter speed or diaphragm aperture required for proper exposure.

REFERENCES:
patent: 3721167 (1973-03-01), Ogiso
patent: 3972055 (1976-07-01), Matsuda et al.
patent: 4045807 (1977-08-01), Ito et al.

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