Title:
ZOOM LENS SYSTEM, INTERCHANGEABLE LENS DEVICE, AND CAMERA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/086153
Kind Code:
A1
Abstract:
Provided is a zoom lens system comprising, in order from the object side to the image side, a first lens group having a negative power, a second lens group having a positive power, a third lens group having a negative power, and a fourth lens group having a positive power. The second lens group comprises, in order from the object side to the image side, an object-side second lens group and an image-side second lens group. The image-side second lens group optically corrects image blurring by moving in a direction perpendicular to the optical axis, and satisfies the condition 1 < |f2I/fw| < 10 (f2I is the combined focal length of the image-side second lens group, and fw is the focal length of the entire system at the wide end). Further provided is an interchangeable lens device and a camera system.
Inventors:
IMAOKA TAKUYA
Application Number:
PCT/JP2011/006966
Publication Date:
June 28, 2012
Filing Date:
December 14, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
IMAOKA TAKUYA
IMAOKA TAKUYA
International Classes:
G02B15/20
Foreign References:
| JP2009014767A | 2009-01-22 | |||
| JP2007279147A | 2007-10-25 | |||
| JP2007078834A | 2007-03-29 | |||
| JP2004061910A | 2004-02-26 | |||
| JPH09113808A | 1997-05-02 | |||
| JP2007078834A | 2007-03-29 | |||
| JP3486532B2 | 2004-01-13 | |||
| JP3587272B2 | 2004-11-10 |
Other References:
See also references of EP 2657744A4
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: