Title:
ZOOM LENS SYSTEM, INTERCHANGEABLE LENS DEVICE, AND CAMERA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/027362
Kind Code:
A1
Abstract:
A zoom lens system provided with a first lens group having a negative power, a second lens group having a positive power, and a rear lens group comprising at least one lens group, wherein the zooming operation is performed by changing the distance between each lens group, and at least two lens elements among all the lens elements constituting the second lens group satisfies the following conditions: 0.660327≤{(ng-nF)+0.001802×(nd-1)}/(nF-nC)≤0.730327 and (nd-1)/(nF-nC)≥50 (wherein ng, nF, nd, and nC respectively represents the refractive index of the g line, F line, d line, and C line of the lens elements constituting the second lens group).
Inventors:
YOSHINAGA SHUNICHIRO
MIYAZAKI KYOICHI
MIYAZAKI KYOICHI
Application Number:
PCT/JP2012/005098
Publication Date:
February 28, 2013
Filing Date:
August 10, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
YOSHINAGA SHUNICHIRO
MIYAZAKI KYOICHI
YOSHINAGA SHUNICHIRO
MIYAZAKI KYOICHI
International Classes:
G02B15/20
Foreign References:
| JP2010181787A | 2010-08-19 | |||
| JP2007133133A | 2007-05-31 | |||
| JP2006309049A | 2006-11-09 | |||
| JP2006308929A | 2006-11-09 | |||
| JP2002277739A | 2002-09-25 | |||
| JPH05134184A | 1993-05-28 | |||
| JPH0519169A | 1993-01-29 | |||
| JPS63241511A | 1988-10-06 | |||
| JPS6162013A | 1986-03-29 | |||
| JP2011237737A | 2011-11-24 | |||
| JP2012027262A | 2012-02-09 | |||
| JP2012181350A | 2012-09-20 |
Attorney, Agent or Firm:
OGASAWARA PATENT OFFICE (JP)
Patent business corporation Ogasawara patent firm (JP)
Patent business corporation Ogasawara patent firm (JP)
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Claims: