Zoom lens having weak front lens group

Details Zoom lens having weak front lens group Zoom lens having weak front lens group

1993-11-08

1996-02-20

Nguyen, Thong Q.

Optical: systems and elements

Lens

With variable magnification

359676, 359691, G02B 1514

Patent

active

054934486

ABSTRACT:
A zoom lens having two groups of lens components including from the object side a positive group and a negative group. The positive group includes two lens units, a weak unit, and a positive unit, while the negative group has at least one negative lens component and provides most of the magnification change during zooming.

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