Compact camera with automatic focal length-dependent exposure settings - calculates values of exposure using weighted average of photometric brightness steps with coeffts. varying according to focus

摘要

The electrical circuit of the camera includes a CPU (40) in command of a stroboscopic circuit (41), film transport control circuit (42), zoom lens control circuit (43), shutter control circuit (44), photometer circuit (45), range-finding circuit (46), datum exposure circuit (47), LCD control circuit (48), self-triggered lamp (17), green and red lamps (22, 23), DX contact circuit (50) and stroboscopic light integrator (54). Each segment of the photometric system sepd. from the photographic optical system gives a brightness step. The CPU computes a weighted average of these steps which varies according to the focal length of the lens. ADVANTAGE - Precise exposure control is ensured, irrespective of the setting of the zoom lens anywhere between its wide-angle and telephoto extreme focal lengths.