| 摘要 |
PURPOSE:To obtain an easy-to-handle camera of simple constitution, and to perform automatic focus adjustment well matched with other sequences, by interrupting automatic servo adjusting operation through light measurement starting, exposure determination, etc. CONSTITUTION:With a switch 4, a camera is powered on through a line 17 to start operating. On the other hand, the signal of a switch 3 or 5 is held high at this time and a high, a low, and a low signal appear on lines 22-24, respectively. Consequently, the outputs -Q and Q of a flip-flop 26 stay high and low, respectively. In response to this low output Q, automatic focusing AF is per formed under servocontrol through a focusing detecting circuit 12, etc. Then, the switch 3 is operated to stop the AF operation. On the basis of an operator's judgement, for example, the switch 5 is turned on to hold the signal of the switch 3 low as if the switch 3 is in operation. Thus, an easy-to-handle-camera of simple constitution is obtained and automatic focus adjustment matched with other sequences is made. |
