Title:
ZOOM LENS SYSTEM, IMAGE CAPTURING DEVICE AND CAMERA
Document Type and Number:
WIPO Patent Application WO/2013/111602
Kind Code:
A1
Abstract:
A zoom lens system is provided with, in order from the object side to the image side, at least a first lens group having positive power, and a second lens group having negative power, increases the distance between the first lens group and the second lens group during zooming from a wide angle end to a telephoto end when an image is captured, and satisfies conditions: D1>D2 and D3>D2 at the same time, where D1 is the effective diameter of an aperture stop at the wide angle end, D2 is the effective diameter of the aperture stop at an intermediate position, and D3 is the effective diameter of the aperture stop at the telephoto end.
Inventors:
EMI KENICHI
BOKU KAZUTAKE
BITO TAKAKAZU
BOKU KAZUTAKE
BITO TAKAKAZU
Application Number:
PCT/JP2013/000386
Publication Date:
August 01, 2013
Filing Date:
January 25, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
G02B15/20; G02B13/18
Foreign References:
| JP2008281927A | 2008-11-20 | |||
| JP2011186417A | 2011-09-22 | |||
| JP2009282429A | 2009-12-03 | |||
| JP2012247562A | 2012-12-13 | |||
| JP2012247563A | 2012-12-13 | |||
| JP2012247564A | 2012-12-13 | |||
| JP2013044755A | 2013-03-04 |
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: