(under subclass 89) Subject matter having means to convey focusing or rangefinding information to a camera operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70, for indicator in exposure control system responsive to distance.
88, for indicator in camera structure with a variable focal length camera objective.
163, for indicator in camera structure with artificial
illumination termination control.
201+, for indicator with object exposure illumination.
239, for indicator in exposure control circuit with manually selective exposure mode. 255, for indicator in exposure control circuit of shutter speed function.
281+, for camera indicator in general.
515, for detachable film holder unit with integral means to show film use which is not visible to operator during normal operation.
578, for fluid treating apparatus testing, calibrating, or indicating.
, FOR 709, for a foreign art collection involving automatic camera focusing with focus indicator.
, FOR 838, for a foreign art collection involving manual camera focusing with distance indicator.
