Camera with automatic flash power level selection
AssigneeRollei-Werke Franke & Heidecke
InventorClaus Prochnow
Life of this patent
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Abstract
Disclosed is a camera having a flash unit with at least two flash power levels. A distance adjustment also used for focusing the lens of the camera and a film sensitivity adjustment combine to position a switch which selects the correct one of the flash power levels for correct exposure of the film. In preferred embodiments, a range indicator, based on the film sensitivity, indicates the distance range over which the various power levels of the flash unit can correctly expose the film. Focusing the camera lens also moves an indicator which, if within the range, selects the appropriate power level for operation when a picture is to be taken.
Claims11
A photographic device for recording photographic images on film, comprising:
- an electronic flash unit having at least two power levels;
- and
- a camera comprising:
- a viewfinder;
- a variable focus objective lens;
- means for adjusting the focal distance of said lens;
- means for indicating the focal distance setting of said lens;
- means for adjusting said camera according to the sensitivity of the film to be used therein;
- and
- means, responsive to said focal distance adjusting means and to said film sensitivity adjusting means, for selecting the correct one of said flash unit power levels for proper exposure of the film at the selected film sensitivity and the selected focal distance, wherein said focal distance indicating means is located in said viewfinder and said camera further includes means, responsive to said film sensitivity adjusting means and located in said viewfinder, for indicating a range of focal distances over which proper film exposure is possible.
Dependencies are inferred from the claim text.