Zoom lens system and camera having the same

Details Zoom lens system and camera having the same Zoom lens system and camera having the same

2005-08-16

2005-08-16

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

C348S240300, C359S687000, C359S690000

Reexamination Certificate

active

06931207

ABSTRACT:
A zoom lens system with a new structure is disclosed which realizes high optical performance by appropriately setting the structure of each lens unit and using a material with anomalous dispersion in an appropriate lens unit. Specifically, according to several aspect herein disclosed, the zoom lens system includes, in order from an object side to an image side, lens units having a positive, a negative, and a positive optical powers in which the structure of each lens unit is specified or a third lens unit employs a lens element made of a material with anomalous dispersion.

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