| 摘要 |
PURPOSE:To simplify the operation by providing an operating ring driving mechanism for releasing the engagement of an operating ring and a focus mechanism by interlocking with an operation of a focus limiter mechanism. CONSTITUTION:When a focus limiter operating ring 50 is turned so as to operate a focus limiter mechanism, in a state that a limiting pin 53 has gone into a slit 61 (a manual operating state that a focus limiter does not operate), the limiting pin 53 is guided along a slant face 62 of a slide groove, moved backward and even if an operating ring 27 is engaged to a focus mechanism, the operating ring 27 is pushed backward by the limiting pin 53, and the engagement of the operating ring 27 and the focus mechanism is released. Accordingly, even of an auto focus is operated, its operation is not transmitted to the operating ring 27, therefore, at the time of operating the focus limiter mechanism, even in when an operation for detaching the operating ring 27 from the focus mechanism has not been executed by mistake, the operating ring is released forcibly from the engagement. In such a way, the focus limiter operation can be easily executed. |
