| 摘要 |
PURPOSE:To accomplish the minuter operation of exposure and to enhance the probability of obtaining appropriate exposure by deciding a photometric area and a photometric system and calculating an exposure value at the time of adopting photometric output, that means, at the time of focusing or just before exposure. CONSTITUTION:Each luminance value from a photometric circuit 17, each stored value(stored luminance value) from a storage means 18, the focal distance fmm and the photographing distance xmm of the lens 2 provided in a photographic lens 1, defocusing quantity deltaAF in a focus detection circuit 12, a used/unused signal from a focus lock operation part 20, a push/half push/total push signal from a release switch 21 and a film sensitivity(ISO) signal are inputted in an exposure operation means 19 so as to calculate the optimum exposure by the use of inputted information. An exposure control means 22 receives the output from the exposure operation means 19 and controls a diaphragm 23 and a shutter 24. By discriminating the change of composition and the kind of a main object, the minuter exposure operation is accomplished. |
