Zoom lens and imaging apparatus

Details Zoom lens and imaging apparatus Zoom lens and imaging apparatus

2007-05-15

2007-05-15

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S681000, C359S682000, C359S683000, C359S686000, C359S689000, C359S715000, C359S716000, C359S740000, C359S749000, C359S761000, C359S770000, C359S781000, C359S557000

Reexamination Certificate

active

11455038

ABSTRACT:
A zoom lens having at least a first lens group including a reflection member for bending an optical axis fixedly during zooming and having a negative refractive power, a second lens group having a negative refractive power, and a third lens group arranged in the order from an object side is provided. In the zoom lens, an image can be shifted into a direction perpendicular to the optical axis by moving either of the second and the third lens groups (“shift lens group”) in a direction perpendicular to the optical axis, and a following conditional expression (1) is satisfied,in-line-formulae description="In-line Formulae" end="lead"?0.5<(1−βα)×βb<3.0,  (1)in-line-formulae description="In-line Formulae" end="tail"?where:βα: a magnification of the shift lens group in a maximum telephoto state, andβb: a magnification of a lens group arranged on an image surface side of the shift lens group in the maximum telephoto state.

REFERENCES:
patent: 2005/0018313 (2005-01-01), Kuba
patent: 2006/0056044 (2006-03-01), Iwasawa
patent: 2003-130043 (2003-05-01), None
patent: 3486532 (2003-10-01), None
patent: 2004-266322 (2004-09-01), None

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