Shutter time control camera

Details Shutter time control camera Shutter time control camera

1982-01-06

1983-03-08

Gellner, Michael L.

354 60R, G03B 962

Patent

active

043759157

ABSTRACT:
A camera includes a drive source which generates a driving torque for moving shutter curtains in response to electrical battery power, and controls the running of the shutter curtains by the driving torque from the drive source. When the battery voltage is below a predetermined value, accurate shutter time control is maintained by providing circuitry which alters the shutter time to a certain value which is greater than a preset exposure value, so that exposure error is as small as possible even when the running speed of the shutter curtains is inaccurate due to lower battery voltage.

REFERENCES:
patent: 4264176 (1981-04-01), Kawamura et al.

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