Title:
ZOOM-LENS SYSTEM, INTERCHANGEABLE-LENS DEVICE, AND CAMERA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/146067
Kind Code:
A1
Abstract:
A zoom-lens system that has, in order from the object side to the image side, a first lens group that has positive power, a second lens group that has negative power, and a trailing lens group comprising at least three lens groups. The trailing lens group contains at least two positive lens groups, the first lens group comprises no more than two lens elements, and the second lens group comprises at least four lens elements. When zooming, the first and second lens groups move relative to the image plane from the wide-angle end to the telephoto end, and when changing focus from infinity to a nearby object, a focusing lens group located between a third lens group and the image plane moves along the optical axis.
Inventors:
UCHIDA TSUNEO
SUEYOSHI MASAFUMI
MATSUMURA YOSHIO
SUEYOSHI MASAFUMI
MATSUMURA YOSHIO
Application Number:
PCT/JP2015/001465
Publication Date:
October 01, 2015
Filing Date:
March 17, 2015
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B15/20
Foreign References:
| JP2012212106A | 2012-11-01 | |||
| JP2006251462A | 2006-09-21 | |||
| JP2014138196A | 2014-07-28 | |||
| JP2014106243A | 2014-06-09 | |||
| JP2014095754A | 2014-05-22 |
Attorney, Agent or Firm:
FUJII, Kentaro et al. (JP)
Fujii Kentaro (JP)
Fujii Kentaro (JP)
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