Programme-controlled shutter

Details Programme-controlled shutter Programme-controlled shutter

1976-04-26

1978-02-07

Adams, Russell E.

354 23D, 354 29, 354 44, 354 60A, G03B 708

Patent

active

040729630

ABSTRACT:
The invention discloses a programme-controlled shutter of the type in which a control circuit controls an exposure control mechanism consisting of a stepping motor and a plurality of shutter blades which also function as aperture setting blades in such a way that the exposure control mechanism sets the optimum aperture for the optimum time interval in response to the brightness of a subject, whereby the optimum exposure is ensured.

REFERENCES:
patent: 3997905 (1976-12-01), Iwata et al.
patent: 4005448 (1977-01-01), Iwata et al.

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