Zoom lens system for use with a compact camera

Details Zoom lens system for use with a compact camera Zoom lens system for use with a compact camera

1986-11-28

1988-01-19

Corbin, John K.

350426, G02B 1514

Patent

active

047201797

ABSTRACT:
Two lens groups the distance between which is changed during zooming. The first lens group closest to the object has a positive focal length and comprises, from the object side, a negative length first lens unit of positive and negative elements, a second lens unit of at least one positive element and a positive focal length third lens unit of positive and negative elements. The second lens group has a negative focal length and comprises one positive and two negative meniscus elements. Eight conditions are imposed on the focal lengths, the refractive indices and the Abbe numbers.

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