Method and apparatus for controlling exposure by selective...

Details Method and apparatus for controlling exposure by selective... Method and apparatus for controlling exposure by selective...

G - Physics

03

B

95/53.3

G03B 7/08 (2006.01) G03B 7/16 (2006.01)

Patent

CA 1160494

METHOD AND APPARATUS FOR CONTROLLING EXPOSURE BY SELECTIVE USE OF BLOCKING VISIBLE FILTER ABSTRACT OF THE DISCLOSURE Method and apparatus for automatically controlling exposure of a photographic film by evaluating non-visible spectral scene light frequencies. Particularly for artificially lit scenes, an evaluation of predominantly infrared frequencies is preferred. In one embodiment, the IR scene lighting is evaluated under control of the shutter aperture system while in another embodiment, the strobe itself is controlled by its own photodetector responsive to IR scene light.

372219

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