Zoom lens and image-pickup apparatus

Details Zoom lens and image-pickup apparatus Zoom lens and image-pickup apparatus

2008-10-22

2009-11-10

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S687000

Reexamination Certificate

active

07616386

ABSTRACT:
A zoom lens achieves a high zoom ratio and high optical performance in an entire zoom range. The zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a rear unit which includes at least one lens unit. At least the second lens unit is moved during zooming such that a distance between the first and second lens units is larger at a telephoto end than at a wide-angle end. The first lens unit includes at least a first lens element made of a material which satisfies Nd1a>2.3−0.01·νd1aand 1.65<Nd1a<2.70. The first and second lens units satisfy 2.5<|f1/f2|<12.0.

REFERENCES:
patent: 5963378 (1999-10-01), Tochigi et al.
patent: 6867925 (2005-03-01), Sato
patent: 6975461 (2005-12-01), Eguchi
patent: 7407334 (2008-08-01), Sato
patent: 2007/0139789 (2007-06-01), Itoh
patent: 06-148523 (1994-05-01), None
patent: 07-270684 (1995-10-01), None
patent: 2000-347102 (2000-12-01), None
patent: 2003-315676 (2003-11-01), None
patent: 2006-084887 (2006-03-01), None
patent: 2007/032505 (2007-03-01), None

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