Exposure calculating device

Details Exposure calculating device Exposure calculating device

1986-02-25

1988-05-24

Perkey, W. B.

354416, 354432, G03B 300, G03B 1505, G03B 728

Patent

active

047469471

ABSTRACT:
An exposure calculating device is disclosed, in which a field of view is divided into a plurality of areas and the brightness values of these areas are measured. Luminance values are calculated based on signals derived from the measured brightness. Under certain conditions, the luminance in the center of the field of view is found, and is used to recalculate the luminance values for an exposure calculation. Further, a brightness control means is provided that divides the field of view into a plurality of areas, any one of which or all may be selected to control the brightness of the exposure.

REFERENCES:
patent: 4412730 (1983-11-01), Saegusa et al.
patent: 4423936 (1984-01-01), Johnson
patent: 4464037 (1984-08-01), Terui et al.
patent: 4465369 (1984-08-01), Saegusa et al.
patent: 4508443 (1985-04-01), Matsuzaki et al.
patent: 4514073 (1985-04-01), Taniguchi et al.
patent: 4557579 (1985-12-01), Nakajima
patent: 4589756 (1986-05-01), Saegusa
patent: 4609274 (1986-09-01), Iwashita et al.

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