Automatic diaphragm control camera

Details Automatic diaphragm control camera Automatic diaphragm control camera

1982-07-07

1983-11-29

Gellner, Michael L.

354 41, 354 43, 354149, G03B 709, G03B 716

Patent

active

044177941

ABSTRACT:
An automatic diaphragm control camera of the T. T. L light measurement type sets a diaphragm to a fully opened aperture in the case of daylight photographing with a low brightness condition by generating a diaphragm stopping-down prevention signal which serves to deactivate an electromagnetic diaphragm stopping-down release device. Upon receipt of a flash readiness signal from an electronic flash device, however, the camera, in preference to the generation of the diaphragm stopping-down prevention signal, activates the electromagnetic diaphragm stopping-down release device in response to a camera release operation.

REFERENCES:
patent: 3777637 (1973-12-01), Kuramoto et al.
patent: 3922693 (1975-11-01), Matsui
patent: 4142787 (1979-03-01), Ueda et al.
patent: 4264159 (1981-04-01), Ueda et al.
patent: 4339186 (1982-07-01), Yamazaki

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