Compact and high-speed wide-angle zoom lens system

Details Compact and high-speed wide-angle zoom lens system Compact and high-speed wide-angle zoom lens system

1988-02-24

1989-07-04

Arnold, Bruce Y.

350450, G02B 15177, G02B 964

Patent

active

048445991

ABSTRACT:
A wide angle zoom lens system having a high level of brightness includes a zooming subsystem comprising first and second movable lens units and a fixed third lens unit. The first lens unit has at least one aspherical lens surface. In the preferred embodiment, a diaphragm is disposed between the second and third lens units and is displaced independently of the second lens group when zooming.

REFERENCES:
patent: 4726665 (1988-02-01), Itoh

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