Patent
1980-01-03
1982-06-29
Adams, Russell E.
350257, G03B 1714
Patent
active
043369910
ABSTRACT:
An interchangeable lens assembly having an adapter member which is maintained rotatively fixed relative to a camera during mounting of the lens assembly, and a lens barrel subassembly rotatable relative to the adapter member and the camera to effect mounting operation, includes a signal transmitting member cooperative with a control member in the camera body for transmission of exposure control signals. A signal member for exposure mode selection is arranged in the lens assembly to project outwardly beyond the surface of the adapter member facing toward the camera and to be retracted therefrom, depending upon whether manual or automatic exposure modes are selected, and when the diaphragm setting ring is rotated to select either one of the modes, information representative of the so-selected mode is transmitted into the camera body.
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patent: 4017878 (1977-04-01), Hagiwara
patent: 4247190 (1981-01-01), Hashimoto et al.
Adams Russell E.
Canon Kabushiki Kaisha
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