Wide angle zoom lens system

Details Wide angle zoom lens system Wide angle zoom lens system

1992-03-03

1994-07-19

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359686, G02B 1514

Patent

active

053314638

ABSTRACT:
A wide angle zoom lens system comprising, in order from the object side, a first positive lens unit, a second positive lens unit and a third negative lens unit; and configured so as to perform variation of focal length by varying airspaces reserved between these lens units. The first lens unit consists of a negative front subunit and a rear positive subunit. The zoom lens system has a wide field angle and favorable optical performance.

REFERENCES:
patent: 4773744 (1988-09-01), Yamanashi
patent: 5148321 (1992-09-01), Goto et al.

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