Zoom lens assembly capable of macro photography
作者： Chun-Yen Lee
DOI:
关键词: Optical axis 、 Ring (chemistry) 、 Zoom lens 、 Focal length 、 Macro 、 Optics 、 Macro photography 、 Base (geometry) 、 Engineering 、 Lens (geology)
摘要: A zoom lens assembly includes an optical system forming axis and having at least one group, a base member ( 1 ), macro ring 2 ) rotatably engaged with the for accomplishing both zooming focusing operations, holder 3 received in group therein, resilient 4 compressively holder, interengaging means 13, 21; 16, 25 provided between member. The has driving 22, 27 disposed thereon manual manipulating. When is manipulated, rotated moved along relative to by action of means, thus focal length varied effecting normal photography photography.
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