Light measurement compensation device for camera

Details Light measurement compensation device for camera Light measurement compensation device for camera

1985-01-02

1985-11-12

Perkey, William B.

354478, G03B 708

Patent

active

045524467

ABSTRACT:
The disclosed light measurement compensation device for a camera includes the known resistors for aperture correction and for curvature correction in order to compensate for the error of light measurement in the full open aperture light measuring mode. The device also includes a resistor for compensating for the light measuring output difference present between two light measuring modes, or partial light measuring mode and average light measuring mode, and another resistor for shifting the light measuring output by a prescribed quantity. For this reason, even though the various light measuring modes, namely, full open aperture-average light measuring, stop down-partial light measuring, full open aperture-partial light measuring, and stop down-average light measuring modes, are selectively used, either an erroneous display or a drop of the exposure accuracy seldom takes place.

REFERENCES:
patent: 3884584 (1975-05-01), Tsunekawa et al.
patent: 3896462 (1975-07-01), Taguchi et al.
patent: 3990085 (1976-11-01), Shono

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