Photography – Camera detail – Diaphragm
Patent
1998-06-15
1999-07-27
Gray, David M.
Photography
Camera detail
Diaphragm
G03B 1724
Patent
active
059305436
ABSTRACT:
An aperture selection mechanism for camera lens includes an aperture strip and a disk selection knob. The aperture strip has two or more different sizes of apertures equally spaced from each other and being sequenced by size. Turning the selection knob, the aperture strip will be moved and one of the apertures will be positioned in the light path of the camera lens. Two or more apertures may be moved to the light path of camera lens one at a time so that the camera can produce better quality of photo and image. The structure is simple, low cost and easy to use.
REFERENCES:
patent: 2380216 (1945-07-01), Carter
patent: 2542939 (1951-02-01), Cisski
patent: 2662457 (1953-12-01), Fairbank
patent: 4063260 (1977-12-01), Toyoshima
patent: 5828914 (1998-10-01), Balling
Chan Chien-Chin
Chang Guang-Shang
Lin Chi-Wen
Pan Chih-Wen
Tseng Kou-Long
Gray David M.
Liauh W. Wayne
Umax Data Systems Inc
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