Title:
ZOOM LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/103695
Kind Code:
A1
Abstract:
Provided are a zoom lens which achieves a 30x zoom ratio while being made compact and in which various types of aberration are excellently corrected and an imaging device using the same. The zoom lens has five lens groups. During zooming, each lens group of a first lens group through a fourth lens group moves, and a fifth lens group does not move during zooming or focusing. The following conditional expressions are satisfied.
1.90 < (β2T/β2W) / (β3T/β3W) < 3.40 (1)
3.00 < f3/fw < 4.50 (2)
Here, β2W is lateral magnification at the wide angle end of the second lens group;
β2T is the lateral magnification at the telephoto end of the second lens group;
β3W is the lateral magnification at the wide angle end of the third lens group;
β3T is the lateral magnification at the telephoto end of the third lens group;
f3 is the focal length (mm) for the third lens group;
and fw is the focal length (mm) of the entire system at the wide angle end.
Inventors:
HIROSE TAKUMA (JP)
Application Number:
PCT/JP2013/083044
Publication Date:
July 03, 2014
Filing Date:
December 10, 2013
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B15/20
Foreign References:
| JP2011186417A | 2011-09-22 | |||
| JP2013044755A | 2013-03-04 |
Attorney, Agent or Firm:
TAMURA Keijiro et al. (JP)
Keijichiro Tamura (JP)
Keijichiro Tamura (JP)
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