Patent ID: 6535692
Filing Date: 2003-03-18
Classification: G03B,H05B

Abstract:
A camera with a built-in electronic flash device, comprising:(a) a photographing lens; (b) an aperture stop; (c) an electronic flash emitting portion; (d) a light receiving element for receiving light reflected on a photographic object which has been emitted by the electronic flash emitting portion; and (e) an electronic flash circuit for making the electronic flash emitting portion emit light, the flash circuit comprising an automatic emission control circuit which stops emission of the electronic flash emitting portion when an amount of the reflected light received by the light receiving element reaches a specified value, wherein with respect to the automatic emission control circuit, A min satisfies the following conditional expression, (Aâˆ’1)EV&lE;A min&lE;(A+0.5)EV, where A min represents a minimum exposure value for a recording medium on which a specified photographic object is recorded when the photographic object that is located at a distance falling within a range from a specified shortest distance to a distance determined by both a guide number obtained when the electronic flash emitting portion emits light at full emission and the aperture stop, is photographed, and A represents a theoretical exposure value.