Exposure mode selecting device

Details Exposure mode selecting device Exposure mode selecting device

1997-10-01

1999-04-20

Perkey, W. B.

Photography

Exposure control circuit

Manually selective exposure mode

396257, 396298, 396529, G03B 720

Patent

active

058951334

ABSTRACT:
An exposure mode selecting device uses an A-position AE mode code, an M-position AE mode code, and a no-aperture-ring AE mode code, so that a proper exposure mode is selected. When an interchangeable lens, having an aperture ring being set to an A-position, is attached to a camera body, the A-position AE mode code is set to 0 or 1 so that a program mode or a shutter speed priority mode can be selected. If the aperture ring is set to one of the M-positions, the M-position AE mode code is set to 0, 1 or 2 so that an aperture priority mode, a manual mode or a bulb mode can be selected. When an interchangeable lens having no aperture ring is attached to the camera body, the no-aperture-ring AE mode code is set to 0, 1, 2, 3 or 4 so that the program mode, the shutter speed priority mode, the aperture priority mode, the manual mode or the bulb mode can be selected.

REFERENCES:
patent: Re32049 (1985-12-01), Okura et al.
patent: Re32080 (1986-02-01), Kawasaki
patent: 4582412 (1986-04-01), Wakabayashi
patent: 4853732 (1989-08-01), Suzuki et al.
patent: 4945376 (1990-07-01), Kawasaki et al.
patent: 5012268 (1991-04-01), Hirai
patent: 5349409 (1994-09-01), Kawasaki et al.

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