Exposure control apparatus for cameras

Details Exposure control apparatus for cameras Exposure control apparatus for cameras

1987-01-06

1988-05-10

Perkey, W. B.

G03B 7097

Patent

active

047439343

ABSTRACT:
A stepping motor drives camera shutter sectors to open and close an exposure aperture. The stepping motor is rotated at a speed corresponding to an exposure value during the time between the start position of the shutter sectors and their position when they start opening the exposure aperture. After the sectors start opening the exposure aperture, the stepping motor is rotated at a constant speed not associated with the exposure value.

REFERENCES:
patent: 3873987 (1975-03-01), Brauning et al.
patent: 3882522 (1975-05-01), Erlichman
patent: 4005448 (1977-01-01), Iwata et al.
patent: 4107705 (1978-08-01), Hashimoto et al.

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