Small-sized wide angle zoom objective

Details Small-sized wide angle zoom objective Small-sized wide angle zoom objective

1985-05-13

1987-03-03

Corbin, John K.

G02B 1514

Patent

active

046471600

ABSTRACT:
A small-sized wide angle zoom objective comprising, from front to rear, a 1st lens unit of negative power, a 2nd lens unit of positive power and a 3rd lens unit, wherein the 1st and 2nd units are made axially movable to effect zooming.

REFERENCES:
patent: 4168110 (1979-09-01), Itoh

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