Patent
1985-11-21
1988-06-28
Gellner, Michael L.
3542891, 354409, 354475, G03B 300, G03B 1720
Patent
active
047542969
ABSTRACT:
There is disclosed a method of an apparatus for displaying accurate camera-to-subject range information in alphanumeric form in a viewfinder of camera along with information as to whether a good or bad picture will be obtained of the subject at the sensed range and in the sensed scene brightness.
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Sonic-Meter by Vexilar 8-22-77, News Release and Descriptive Brochure.
Gellner Michael L.
Payne Leslie J.
Polaroid Corporation
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