Wide angle high range zoom lens

Details Wide angle high range zoom lens Wide angle high range zoom lens

1985-07-29

1987-09-01

Corbin, John K.

G02B 710, G02B 964, G02B 1514

Patent

active

046905138

ABSTRACT:
A zoom lens is constructed, from front to rear, of a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power and a fourth lens unit of positive or negative power. When zooming from the wide angle to the telephoto end, the first and third lens units move forward at the same speed, while the second lens unit moves simultaneously in non-linearly differential relation to the first and third lens unit. The zoom lens satisfies the following conditions:

REFERENCES:
patent: 4572620 (1986-02-01), Kikuchi

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