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Title:
ZOOM LENS, OPTICAL EQUIPMENT INCORPORATING MOUNTED WITH THE SAME, AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2010097127
Kind Code:
A
Abstract:

To provide a zoom lens that is suitable for a video camera, electronic still camera or the like, has, in particular, an optical element for bending an optical path, is ultra-small, and gives high image quality and has high variable power; and to provide an optical apparatus mounted with the zoom lens, and a method of manufacturing the same.

The zoom lens having the optical element for bending an optical path includes, in order from an object side along an optical axis, a first lens group G1 of positive refractive power, a second lens group G2 of negative refractive power, a third lens group G3 of positive refractive power, a fourth lens group g4 of positive refractive power, and a fifth lens group G5 of negative refractive power. The first lens group G1 includes, in order from the object side along the optical axis: a front lens group GF; an optical element P for bending the optical path; and a rear lens group GR. In this configuration, when the focal length of the zoom lens at a wide-angle end is fW, the focal length of the front lens group GF is GFf, and the focal length of the rear lens group GR is GRf, the zoom lens satisfies the following conditions: 2.0|GFf/fW|3.0 and 1.7|GRf/fW|3.0.


Inventors:
ARAI DAISAKU
Application Number:
JP2008269803A
Publication Date:
April 30, 2010
Filing Date:
October 20, 2008
Export Citation:
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Assignee:
NIKON CORP
International Classes:
G02B15/20; G02B13/18; H04N5/225
Domestic Patent References:
JP2008032924A2008-02-14
JP2008083125A2008-04-10
JP2004170707A2004-06-17
JP2008225314A2008-09-25
JP2006209100A2006-08-10
JP2006251037A2006-09-21
JP2004354871A2004-12-16
JP2004354869A2004-12-16
JP2010026293A2010-02-04
JP2010039188A2010-02-18
JP2009047988A2009-03-05
JP2009198722A2009-09-03
JP2009265557A2009-11-12
JP2009265569A2009-11-12
JP2009047986A2009-03-05
Attorney, Agent or Firm:
Masago Onishi