Compact zoom lens system

Details Compact zoom lens system Compact zoom lens system

1988-03-17

1989-06-13

Corbin, John K.

350426, G02B 1514, G02B 964

Patent

active

048386693

ABSTRACT:
A zoom lens system having a short total length and a small outside diameter, comprising a front lens group having positive refractive power and a rear lens group having negative refractive power, and so designed as to change focal length by varying an airspace reserved between said lens groups; said front lens group consisting, in the order from the object side, of a positive meniscus lens, a negative lens and at least one positive lens, and said rear lens group consisting of a positive lens, a biconcave lens and a negative meniscus lens.

REFERENCES:
patent: 4682860 (1987-07-01), Tanaka et al.
patent: 4720179 (1988-01-01), Ito

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