Camera with auxiliary light emission and auto-focus

摘要

The camera is capable of appropriate judgment as to whether or not an auxiliary light is to be emitted according to a luminance of a subject to be focused on by basing that judgment on a sensor output used in auto-focusing control. The camera is also capable of judging whether or not an auxiliary light is needed in a short period of time by setting a sensor sensitivity at a high level and of accurate auto-focusing control by setting the sensor sensitivity at a low level when an auxiliary light is to be emitted. When a shutter release button is half pressed, first an R sensor and an L sensor, which are passive type range finding devices are set at high sensitivity to shoot the subject, and a time taken to obtain a prescribed sensor output is measured. According to a length of time so measured, it is judged whether or not to emit an auxiliary light for auto-focusing use. If the auxiliary light is to be emitted, the sensor sensitivity is set at a low level and the subject is shot again to determine the subject distance on the basis of the sensor output at the time.