Camera light measuring system with aperture correction for diffe

Details Camera light measuring system with aperture correction for diffe Camera light measuring system with aperture correction for diffe

1985-05-15

1987-03-24

Perkey, William B.

354455, G03B 7081, G03B 720

Patent

active

046521097

ABSTRACT:
In the disclosed system shifting light-measuring modes are shifted by restricting the view angle of a light sensitive element or by producing differences between a first light measuring circuit and a second light measuring circuit, each having a different light measuring range. A correction circuit determines aperture corrections for mode changes. When the exposure is controlled, the output of the light measurement is corrected by the output of the correction circuit.

REFERENCES:
patent: 4306787 (1981-12-01), Fukuhara et al.
patent: 4420252 (1983-12-01), Nakauchi

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