Synchronizing speed warning apparatus for camera

Details Synchronizing speed warning apparatus for camera Synchronizing speed warning apparatus for camera

1978-07-06

1980-04-22

Gellner, Michael L.

354 60L, 354128, 354149, 354289, G03B 708, G03B 1505, G03B 1718

Patent

active

041992369

ABSTRACT:
A photographic camera for use in conjunction with a flash device is provided with a warning apparatus which provides a warning signal when a selected shutter speed is beyond a shutter speed range synchronizable with the light emission from the flash device. The warning apparatus comprises a circuit for providing a signal indicating that the selected shutter speed is faster than a limit shutter speed, beyond which the shutter cannot be synchronized with the flash. A charge detection circuit detects the completion of charging of the flash device. A warning indication that the selected shutter speed is faster than the limit shutter speed is provided only upon completion of charging of the flash device, thereby conserving battery power.

REFERENCES:
patent: 3688664 (1972-09-01), Mashimo
patent: 3971050 (1976-07-01), Okuno et al.

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