Zoom lens assembly capable of macro photography

Details Zoom lens assembly capable of macro photography Zoom lens assembly capable of macro photography

2005-07-08

2008-09-30

Perkey, W. B. (Department: 2862)

Photography

Having variable focal length of camera objective

Manually selected preset zoom position or range

C396S077000, C396S079000, C396S083000, C396S103000, C396S133000, C359S705000, C359S706000, C359S819000, C348S240990, C348S373000, C348S374000

Reexamination Certificate

active

07430368

ABSTRACT:
A zoom lens assembly includes an optical system forming an optical axis and having at least one lens group, a base member (1), a macro ring member (2) rotatably engaged with the base member for accomplishing both zooming and focusing operations, a lens holder (3) received in the macro ring member and having the at least one lens group received therein, a resilient member (4) compressively engaged with the lens holder, and an interengaging means (13, 21; 16, 25) provided between the macro ring member and the base member. The macro ring member has a driving member (22, 27) disposed thereon for manual manipulating. When the driving member is manipulated, the macro ring member is rotated and moved along the optical axis relative to the base member by the action of the interengaging means, and thus the focal length of the optical system is varied for effecting both normal photography and macro photography.

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