Camera having a variable photographing aperture and control meth

Details Camera having a variable photographing aperture and control meth Camera having a variable photographing aperture and control meth

1993-02-12

1994-04-19

Perkey, W. B.

354159, 3541951, G03B 708, G03B 1702

Patent

active

053050517

ABSTRACT:
A camera having a variable photographing aperture, including a photographing aperture size changing device that changes the size of the photographing aperture, and an exposure calculating device for calculating exposure factors including a diaphragm value and a shutter speed in accordance with the brightness of an object to be photographed. The camera further includes an exposure adjusting device which modifies the exposure factors when the photographing aperture is changed. The invention is also directed to a control method of a variable photographing aperture camera.

REFERENCES:
patent: 4202624 (1980-05-01), Krehbiel
patent: 4639111 (1987-01-01), Harvey
patent: 5010357 (1991-04-01), Misawa
patent: 5086311 (1992-02-01), Naka et al.

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