Long time exposure preventing device for camera with electronic

Details Long time exposure preventing device for camera with electronic Long time exposure preventing device for camera with electronic

1978-09-20

1980-06-24

Gellner, Michael L.

354 60F, 354139, G03B 708, G03B 1503

Patent

active

042092450

ABSTRACT:
A signal indicating that the correct exposure value has been achieved and a signal indicating the completion of flash are logically summed to provide a shutter closing signal. This ensures that the shutter will be closed even when the light emitted by the flash is insufficient to achieve the proper level of exposure.

REFERENCES:
patent: 4021824 (1977-05-01), Uchiyama et al.
patent: 4079389 (1978-05-01), Hashimoto et al.
patent: 4096492 (1978-06-01), Land et al.

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