Exposure control device of a camera

Details Exposure control device of a camera Exposure control device of a camera

1982-07-07

1984-05-15

Perkey, William B.

354443, 354448, 354474, G03B 7087, G03B 7097, G03B 1718

Patent

active

044485069

ABSTRACT:
An exposure control device of a camera comprises first metering means for effecting metering while dividing an object into a plurality of metering areas and for generating a first metering output determining the exposure of the entire object on the basis of a plurality of photoelectric outputs corresponding to said areas, second metering means for generating a second metering output corresponding to the object light passed through the aperture of a phototaking lens, first operational means for generating a first operation output including information on the difference between the first metering output and the second metering output, second operational means for synthesizing the second metering output during the stop-down of said aperture and the first operation output and generating a second operation output, and blocking means for blocking the stop-down when the second operation output and an output corresponding to a preset shutter speed assume a predetermined relation.

REFERENCES:
patent: 3973266 (1976-08-01), Kakunodate et al.
patent: 4047187 (1977-09-01), Mashimo et al.
patent: 4176955 (1979-12-01), Yamada et al.

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