Camera exposure control system selectively operative in exposure control mode based on multi-spot light measurement or in exposure control mode based on flash light

摘要

A camera exposure control system based on multi-spot light measurement is designed to determine the exposure value from measured values provided by measuring the brightness of arbitrary portions of the photographic view field a plurality of number of times. With exposure control mode based on multi-spot light measurement being selected by the photographer, exposure control is implemented based on the exposure value resulting from multi-spot light measurement, and the operation of the flash device is disabled automatically. With flash light photography mode being selected by the photographer, exposure control based on multi-spot light measurement is disabled, and exposure control based on averaged light measurement or exposure control for flash light photography is implemented. In the case of program exposure control based on the exposure value resulting from multi-spot light measurement, the exposure control value is determined by restoring the reference program line at each implementation of the program exposure control based on a new exposure value, even if the program line has been altered.