| 摘要 |
PURPOSE:To improve operability so as to be used easily, by executing automatic focusing control, by operation of switches which are dispersed and placed on a camera body and a photographic lens. CONSTITUTION:When a continuous AF mode is selected by a mode changeover switch 6 in a photographic lens 2 side, and electric power is fed by turning on an operation switch 5 of a camera body 1 side, a flip-flop 22 is reset by a high output from a comparator 16, and the Q output becomes low. An output of an invertor 20 becomes high, an amplifying circuit 25 operates, a servo-amplifying circuit 26 controls a motor 27 in accordance with an input, and automatic focusing of a lens is executed. When an operation switch 7 of the photographic lens 2 side is opened, an output of a comparator 15 becomes high, an output of the comparator 16 becomes low, the amplifying circuit 25 is not operated, a motor 27 is stopped, and focusing control of the lens is stopped. |
