| 摘要 |
PURPOSE:To correct parallax in the entire region of an object distance by moving an objective lens or field frame plate cooperatively with a scan plate displaced according to the object distance in prefocusing thereby changing the image position of the visual field or field frame. CONSTITUTION:When a release button is depressed, a release lever 41 is moved downward to actuate a photometric circuit, a distance measuring device, etc. A lock lever 31 is pushed by a projecting piece 41a and is thus disengaged from a link 32. A scan plate 30 is moved leftward by a spring 33 and a distance stopper 24 is turned clockwise by an interlocking pin 34. When a signal AF is outputted from the distance measuring device interlocked to the plate 30 during this time, a magnet 27 is deenergized and a pawl plate 26 is released and is turned by a spring 28 so that the plate is engaged to any one among the teeth 24b of the stopper 24. The plate 30 is moved by as much as the distance corresponding to the object distance by the pin 34 and is stopped then the 2nd objective lens 13 is vertically moved. The parallax is thus automatically corrected at all the object distances in the above-mentioned way. |
