Aperture-priority lens shutter apparatus for a camera

Details Aperture-priority lens shutter apparatus for a camera Aperture-priority lens shutter apparatus for a camera

1993-11-10

1994-09-20

Perkey, W. B.

354435, G03B 1336, G03B 7097

Patent

active

053494148

ABSTRACT:
An aperture-priority lens shutter apparatus for a camera has a compact construction and an automatic exposure control function. The aperture-priority electromagnetic lens shutter apparatus for a camera comprises a lens mount; two lens shutter blades serving as a lens shutter and a diaphragm at the same time; a driving mechanism for driving the lens shutter blades; a button switch for setting an F number manually; a light measuring circuit for emitting a signal corresponding to the amount of light available to photograph an object; and a central processing unit including an exposure control time table in which the exposure control data are inputted, an operator for operating an exposure time in case of a semiautomatic mode and a driver for driving the driving mechanism.

REFERENCES:
patent: 4470687 (1984-09-01), Saito et al.
patent: 4772841 (1988-09-01), Maruyama et al.
patent: 4959680 (1990-09-01), Ishida et al.
patent: 5255049 (1993-10-01), Akimoto et al.
patent: 5291237 (1994-03-01), Tagami et al.

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