1988-10-19
1991-01-08
Hix, L. T.
354478, G03B 708, G03B 7099
Patent
active
049840070
ABSTRACT:
A camera body to which a photographing lens storing data associated with a full-aperture value and data associated with a position of an exit pupil can be attached, includes an optical member for scattering radiation from the photographing lens, light-receiving element, and a photometric optical system for guiding the radiation from the photographing lens through the optical member toward the light-receiving element. The optical member is arranged on a side opposite to an object with respect to the photographing lens. The light-receiving element generates an output according to the radiation incident from the photometric optical system. The camera body further includes a correction circuit for reading out the data associated with the full-aperture value and the position of the exit pupil, calculating a correction amount based on the readout data, and correcting the output from the light-receiving element based on the calculated correction amount, and an exposure control circuit for performing exposure control based on the corrected output.
REFERENCES:
patent: 4306787 (1981-12-01), Fukuhara et al.
patent: 4529288 (1985-07-01), Nakai et al.
patent: 4636054 (1987-01-01), Saegusa
Hix L. T,.
Nikon Corporation
Spyrou Cassandra C.
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