| 摘要 |
PURPOSE:To make combination use of a manual distance matching mechanism and an automatic focusing mechanism by making lens position movable irrespectively of the distance measured value of a trigonometrical measurement system by releasing or limiting an interlocking mechanism for manual and automatic systems. CONSTITUTION:In the case of changing over from an automatic focusing system to a manual system, a changeover switch 10 is provided between a focus controlling amplifier 5 and a focus stopping electromagnet 6, by which a rangefinder is disconnected from a lens forward-backward moving and interlocking device, and it is now possible to set the lens position manually. Here, if the lens is moved forward or backward by rotating the same manually, the display in a finder 11 changes with the movement of the lens, and if it is matched, for example, to a display C out of the displays A-D, the lens focuses at a 3m distance, and the focusing is accomplished irrespectively of the automatic focusing mechanism. |
