MEMORY TYPE EXPOSURE CONTROL SYSTEM

摘要

A memory type exposure control system for controlling the shutter speed of a camera wherein an electrical change of a photovoltaic element on which the light from a scene being photographed impinges through the photographic objective of the camera is amplified by an amplifier circuit and is memorized by a memory condenser in the form of a voltage, and the memorized voltage is applied to a field effect transistor of which the output resistance effected thereby is combined with another condenser to constitute a shutter speed controlling-RC timing circuit whereby the delay time determines the duration of shutter control pulse, an improvement being effected in the sensor circuit so that the memory type exposure control system is made sufficiently responsive to a wider range of incident light intensity than was ever possible.