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Zoom lens capable of short distance photography

阅读:342发布:2020-09-20

专利汇可以提供Zoom lens capable of short distance photography专利检索,专利查询,专利分析的服务。并且PURPOSE:To simplify structure and to realize precise operation by constituting a cum groove, with which a pin for variable power provided on the operation frame is engaged, with the cam groove of a circumferential groove and an optical-axis-directional cam groove which connects with it. CONSTITUTION:For switching from a normal photography area to a macro photography area, when the operation frame at the shortest focus position W or the longest focus position T in the normal photography area is switched to macro photography areas WM and TM, the operation frame at the position W or M is further turned to the short distance side. Then, the variable power pin 5a is raised from the bottom side of a cam groove 2c1 in an inverted T shape to turn by a necessary mcro turning angle by cam grooves 3b'1 and 3b''1 provided extending upward slantingly from the left and right ends of the cam groove 3b1 of a fixed frame and cam grooves 2c'1 and 2c''1 extending to left and right from the lower end part of the cam groove 2c1 of the operation frame in optical-axis directions.,下面是Zoom lens capable of short distance photography专利的具体信息内容。

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