Photography – Exposure control circuit – Manually selective exposure mode
Patent
1995-01-30
1997-02-11
Adams, Russell E.
Photography
Exposure control circuit
Manually selective exposure mode
396242, 396239, 396245, G03B 708
Patent
active
056026161
ABSTRACT:
A camera having a manually actuable switch for temporarily shifting the camera to an optimum exposure value so that exposure factors, based upon a manually set shutter speed and a manually set aperture value, are replaced by optimum exposure factors based upon a metered brightness of the object to be photographed when the camera is set to a non-program exposure mode. A clear button associated with the camera functions as a manually actuable switch for temporarily shifting an exposure mode of the camera to another exposure mode when the camera is set to a hyper-manual exposure mode. In the hyper-manual exposure mode, a photographer sets exposure factors by actuating a Tv electronic dial and an Av electronic dial. Actuation of the clear button when the camera is set to the hyper-manual exposure mode causes the set exposure factors to be replaced with optimum exposure factors that are automatically calculated in accordance with an object brightness Bv. Thus, operating the clear button (manually actuable switch for temporarily shifting to another exposure mode) results in the mode of the camera being changed from a mode in which exposure factors are manually set by a photographer (via the setting of a shutter speed and an aperture value) to a mode in which optimum exposure factors are set based upon a calculation performed by a processor of the camera.
REFERENCES:
patent: 3964073 (1976-06-01), Kobori et al.
patent: 4174160 (1979-11-01), Nanba et al.
patent: 4320944 (1982-05-01), Nakai
patent: 4344681 (1982-08-01), Yamada
patent: 4653893 (1987-03-01), Inoue et al.
patent: 4745428 (1988-05-01), Miyasaka
patent: 4779115 (1988-10-01), Fujino et al.
patent: 4841322 (1989-06-01), Kawasaki et al.
patent: 4945376 (1990-07-01), Kawasaki et al.
patent: 5005033 (1991-04-01), Miyasaka
patent: 5012268 (1991-04-01), Hirai
patent: 5280319 (1994-01-01), Sato et al.
patent: 5382997 (1995-01-01), Sato et al.
Nikon FA, company brochure.
English language translation of the German Office Action posted Feb. 1, 1994.
Hirai Isamu
Kitazawa Toshiyuki
Matsudo Nobuhiko
Nakano Satoshi
Sato Osamu
Adams Russell E.
Asahi Kogaku Kogyo Kabushiki Kaisha
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