Title:
ZOOM LENS, OPTICAL DEVICE AND METHOD FOR MANUFACTURING ZOOM LENS
Document Type and Number:
WIPO Patent Application WO/2014/192288
Kind Code:
A1
Abstract:
A zoom lens includes a first lens group (G1) having a negative refractive power, and a second lens group (G2) having a positive refractive power, which are disposed side by side in order from an object, and satisfies the following conditional expression (1):
1.90 < ft / Gf2 < 3.50 ⋅⋅⋅ (1)
Where ft represents the focal length of a zoom lens (ZL) while in the telephoto end state, and Gf2 represents the focal length of the second lens group (G2).
Inventors:
ARAI DAISAKU (JP)
Application Number:
PCT/JP2014/002783
Publication Date:
December 04, 2014
Filing Date:
May 27, 2014
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/16
Foreign References:
| JPH01210914A | 1989-08-24 | |||
| JPH08320435A | 1996-12-03 | |||
| JP2002365545A | 2002-12-18 | |||
| JP2004053633A | 2004-02-19 | |||
| JP2004102211A | 2004-04-02 | |||
| JP2006284790A | 2006-10-19 | |||
| JP2010091948A | 2010-04-22 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
Shogo Onishi (JP)
Shogo Onishi (JP)
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