| 摘要 |
PURPOSE:To reduce the number of parts added to a lens, by arranging a detecting device and a lens driving device in the body side and the lens side respectively in an auto-focus single-lens reflex camera of the TTL system. CONSTITUTION:In the body side of the single-lens reflex camera where an exchange lens 20 is mounted on a body 21, the light flux led by a submirror 24 is incident to a focus detecting element 25, and a motor 15 is driven by a control signal obtained by a detecting circuit 13 and a control circuit 14a to drive the lens optical system in the longitudinal direction. A motor, a power source, a lens driving mechanism, etc. are incorporated in the exchange lens, and the exchange lens is connected to the control circuit by contacts 27a-30a brought into contact with corresponding body-side contacts. |
