Camera diaphragm with follow focus control

Details Camera diaphragm with follow focus control Camera diaphragm with follow focus control

1975-03-19

1976-06-08

Hix, L. T.

354196, 354271, G03B 708

Patent

active

039627071

ABSTRACT:
Camera diaphragm control apparatus in which slidable diaphragm blades are adjustable by a differential motor to establish and continually maintain an exposure aperture of size related to ambient scene brightness. A linkage, responsive to mounting a flash unit on the camera, connects the differential motor to a focus control member. Through the linkage, the focus control can override the adjustment of the diaphragm by the differential motor, and permit diaphragm adjustment with both ambient light and focus of the camera with distance to the photographic object.

REFERENCES:
patent: 3714871 (1973-12-01), Bresson

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