Zoom lens

Details Zoom lens Zoom lens

1990-04-26

1991-02-12

Arnold, Bruce Y.

350450, G02B 1515, G02B 964

Patent

active

049919423

ABSTRACT:
A zoom lens comprising, from front to rear, a first lens group of positive power, a second lens group of negative power, and a third lens group of positive power, wherein the second and third lens groups are axially moved in differential relation to effect zooming, and the following conditions are satisfied:

REFERENCES:
patent: 4815829 (1989-03-01), Yamanashi et al.

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