Zoom lens system

Details Zoom lens system Zoom lens system

2006-10-24

2006-10-24

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S684000, C359S682000

Reexamination Certificate

active

07126759

ABSTRACT:
A super-wide zoom lens system having sufficient zoom ratio and a high speed, capable of obtaining high optical performance. The system includes at least, in order from an object, a first lens group G1having negative refractive power, and a second lens group G2having positive refractive power. When zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1and the second lens group G2varies. The first lens group G1includes at least one negative lens element and a glass material constructing at least one negative lens element (SL1) in the first group G1satisfies given conditions.

REFERENCES:
patent: 5329401 (1994-07-01), Sato
patent: 5576890 (1996-11-01), Tanaka et al.
patent: 5663835 (1997-09-01), Shibayama
patent: 5920435 (1999-07-01), Shibayama
patent: 6317271 (2001-11-01), Sensui
patent: 6-82698 (1994-03-01), None
patent: 2000-221399 (2000-08-01), None
patent: 2000-241704 (2000-09-01), None
patent: 2001-83421 (2001-03-01), None

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