CONTROLLER FOR AMOUNT OF EXPOSURE OF CAMERA

摘要

PURPOSE:To obtain invariably optimum exposure by calculating the difference in reflection factor between a film surface and a shutter curtain surface. CONSTITUTION:Reflected light from the shutter curtain surface and film surface is measured and a control circuit 16 controls the amount of exposure on the basis of measurement outputs. The reflected light or transmitted light of a film is measured 3 and the difference in reflection factor between the film surface and shutter curtain surface is calculated 46 from the difference between the obtained quantity of the reflected light of the film surface and the comparative quantity of light. Then, the calculated difference is displayed 17.