Zoom lens system

Details Zoom lens system Zoom lens system

1999-07-08

2000-06-06

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

060726385

ABSTRACT:
A zoom lens system including a positive first lens group and a negative second lens group, in that order form the object. The positive first lens group includes, on the most-object side, a cemented sub lens group having a negative lens element and a positive lens element. The zoom lens system satisfies the following conditions, and the order of the lens elements in the cemented sub lens group is the negative lens element and positive lens element in this order from the object:

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patent: 5751498 (1998-05-01), Ito
patent: 5900991 (1999-05-01), Kang

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