Title:
ZOOM LENS, IMAGING DEVICE, METHOD OF VARYING MAGNIFICATION OF ZOOM LENS, AND METHOD OF PREVENTING SHAKE OF ZOOM LENS
Document Type and Number:
WIPO Patent Application WO/2008/013307
Kind Code:
A1
Abstract:
A zoom lens etc. The zoom lens is suitable for high pixel electronic imaging element,
having a high magnification ratio, and reduced in size. The zoom lens has, in
the mentioned order along the optical axis from the object side, a first lens group
(G1) having positive refractive power, a second lens group (G2) having negative
refractive power, a third lens group (G3) having positive refractive power,
a fourth lens group (G4) having positive refractive power, and a fifth lens group
(G5) having negative refractive power. The variation of the magnification
from a wide-angle end state (W) to a tele end state (T) is made by moving the second
lens group (G2) and the fourth lens group (G4) in the optical axis direction. The
first lens group (G1) has, in the mentioned order along the optical axis from the
object side, a front lens group (G1f) having negative refractive power, a light
path bending element (P) for bending the light path, and a rear lens group (G1r)
having positive refractive power. The zoom lens satisfies a predetermined
conditional formula.
Inventors:
MITSUKI, Shinichi (C/O NIKON CORPORATION, 2-3 Marunouchi 3-chome, Chiyoda-k, Tokyo 31, 1008331, JP)
Application Number:
JP2007/065029
Publication Date:
January 31, 2008
Filing Date:
July 25, 2007
Export Citation:
Assignee:
NIKON CORPORATION (2-3 Marunouchi 3-chome, Chiyoda-ku Tokyo, 31, 1008331, JP)
株式会社ニコン (〒31 東京都千代田区丸の内３丁目２番３号 Tokyo, 1008331, JP)
株式会社ニコン (〒31 東京都千代田区丸の内３丁目２番３号 Tokyo, 1008331, JP)
International Classes:
G02B15/16; G02B13/18; G03B5/00; H04N5/225; H04N5/232; G02B15/16; G02B13/18; G03B5/00; H04N5/225; H04N5/232
Attorney, Agent or Firm:
INOUE, Yoshio (3F Garoh Bldg, 1-4 Nihonbashi,3-chome, Chuo-k, Tokyo 27, 1030027, JP)
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