Zoom lens system

Details Zoom lens system Zoom lens system

1994-07-27

1996-12-24

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359708, G02B 1514

Patent

active

055878415

ABSTRACT:
A zoom lens system including three lens groups. A positive first lens group having a negative lens and a positive lens, a positive second lens group having a negative lens assembly and a positive lens assembly, and a negative third lens group. The first, second and third lens groups are moved toward the object to be photographed upon the zooming operation from a short focal length to a long focal length and satisfy the relationship of:

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