Title:
ズームレンズ及びそれを有する撮像装置
Document Type and Number:
Japanese Patent JP5455613
Kind Code:
B2
Abstract:
A small zoom lens having a high zoom ratio and high optical performance over an entire zoom range is obtained. The zoom lens includes, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a negative refractive power; and a fifth lens unit having a positive refractive power, wherein intervals between the first lens unit, the second lens unit, the third lens unit, the fourth lens unit, and the fifth lens unit are changed during zooming, in which a focal length (fw) of an entire system at a wide angle end and a focal length (fn) of an n-th lens unit are set appropriately.
Inventors:
Takeshi Shinohara
Application Number:
JP2009294300A
Publication Date:
March 26, 2014
Filing Date:
December 25, 2009
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/167; G02B13/18
Domestic Patent References:
| JP2010122536A | ||||
| JP2011075985A | ||||
| JP2008281927A | ||||
| JP2010044190A | ||||
| JP2010044191A |
Attorney, Agent or Firm:
Yukio Takanashi