| 摘要 |
PURPOSE:To ensure the photographing with accurate photometric quantity, by using a photometric circuit that performs the averaged overall light reading and the partial light reading within the finder viewfield in addition to a photometric circuit that leads the subject light reflected on the film surface and detecting the difference of the values obtained from these two circuits to use it for the value of compensation of a main photometric circuit. CONSTITUTION:Three photodetectors 12, 13 and 14 for light reading are provided at the bottom part of a camera main body 11 placed at a position where the photographing optical path passing through a picture taking lens 3 is not prevented. The detectors 12 and 13 can receive the subject light which is projected on a finder screen 5 while a mobile mirror 15 is set down. The detector 12 is used for the averaged overall light reading purpose and receives the light reflected from an entire region A1 in a virtually even way. The detector 13 has a mask 16 at the front for controlling the photodetecting region and is used for the partial light reading purpose to receive the light reflected from a spot region A2. The detector 14 is set as opposed to a film 4 so that it can receive the reflected light of the subject which is projected on the photographing surface of the film 4 while the mirror 15 is set up. |
