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US 4,003,646 AGranted
Cine cameras
AssigneesKarl Vockenhuber, Dennis Hauser
InventorsOtto Freudenschuss, Gerd Kittag
Life of this patent
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Abstract
A cine camera with an exposure regulating device for regulating the aperture during operation with a continuously driven shutter and having means for stopping the rotation of the shutter in an open position to provide long exposures. The means for stopping the rotation of the shutter for long exposures operates automatically when the maximum available aperture is inadequate to provide correct exposure when the shutter is driven continuously.
Claims14
In a cine camera including a lens system for image light from a subject onto a film;
- and a shutter arranged in the path of the light;
- in combination
- exposure regulating means including a photo-electric transducer and an adjustable diaphragm for varying the filming aperture, during continuous operation of the shutter with predetermined exposure time for each film frame, to provide correct film exposure;
- sensing means for sensing when the maximum available aperture is inadequate for correct exposure within the said predetermined exposure time;
- and
- means operable in response to an output of said sensing means for holding the shutter open, for each film frame, for a sufficient time to achieve correct exposure.
3 more elements
Dependencies are inferred from the claim text.