Photometric device to determine a correct photometric value of a

Details Photometric device to determine a correct photometric value of a Photometric device to determine a correct photometric value of a

1995-07-07

1997-02-11

Perkey, W. B.

Photography

Exposure control circuit

Having log transformation circuit

396234, G03B 708

Patent

active

056026153

ABSTRACT:
A photometric device, used in an optical apparatus such as a camera, which includes photometric elements to measure photometric values according to plural regions of a subject field, and corrects the photometric values of photometric elements corresponding to specific regions within the plural regions based on the photometric values of regions outside the specific region and on previously set correction coefficients according to each region. The location of the specific regions on the subject field may be adjusted either manually or automatically based upon a focus adjustment state of a focus detection unit.

REFERENCES:
patent: 4476383 (1984-10-01), Fukuhara et al.
patent: 5189460 (1993-02-01), Hayakawa
patent: 5510837 (1996-04-01), Takei

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