Exposure time control device for an electric shutter in a single

Details Exposure time control device for an electric shutter in a single Exposure time control device for an electric shutter in a single

1972-12-14

1976-01-06

Peters, Jr., Joseph F.

354 50, 354 51, 354 60R, G03B 708

Patent

active

039316289

ABSTRACT:
A control device for controlling the exposure time automatically for an electric shutter, in a single reflex camera of the so-called "through the lens" photometric type which determines the brightness of an object by means of the light past through the projection lens of a camera.

REFERENCES:
patent: 3295424 (1967-01-01), Riber
patent: 3450016 (1969-06-01), yamada
patent: 3533348 (1966-09-01), yanagi
patent: 3693518 (1972-09-01), yamada et al.

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