| 摘要 |
PURPOSE:To select photometric distribution optionally and to prevent improper exposure by discriminating the difference between the 1st arithmetic output adjusted by a photometric distribution setting member and the 2nd arithmetic output. CONSTITUTION:The outputs Bv(A) and Bv(S) of an averaged light measuring circuit LM1 and a spot light measuring circuit LM2 are divided internally by a slide terminal BRS adjusted by a photometric part setting member to obtain the 1st arithmetic output and the 2nd arithmetic output which has a 1 internal division ratio. The difference between both the arithmetic outputs is found by an operational amplifier OP2 and when it exceeds a prescribed value, an OR gate OR1 has a level H to turn on an analog gate G2 and to turn off an F1. Consequently, exposure control is exercised by the 2nd arithmetic output. When the difference is below the prescribed value, an L-level OR gate output is generated and while the F2 turns off, the F1 turns on, thereby performing the control by the 1st arithmetic output. |
