Zoom lens system and image-pickup apparatus

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

2007-01-30

2009-06-30

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000, C359S683000

Reexamination Certificate

active

07554744

ABSTRACT:
A zoom lens system includes, in order from the object side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, a fourth lens unit having positive refractive power, and a fifth lens unit. When the lens positions change from the wide-angle end to the telephoto end, at least the first to fourth lens units are movable in an optical axis direction. The fifth lens unit includes a negative subunit having negative refractive power and a positive subunit having positive refractive power and being disposed on the image side of the negative subunit with a predetermined air gap the negative subunit and the positive subunit, and is capable of shifting the image by shifting the positive subunit in a direction substantially orthogonal to the optical axis.

REFERENCES:
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patent: 7190520 (2007-03-01), Misaka
patent: 7286300 (2007-10-01), Kuroda et al.
patent: 7312934 (2007-12-01), Iwasawa
patent: 05-224160 (1993-09-01), None
patent: 2001-228397 (2001-08-01), None
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patent: 2005-128186 (2005-05-01), None
patent: 2005-215385 (2005-08-01), None
European Search Report, for Application No. 07102029.1, dated Aug. 4, 2008.

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