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 JP5959938
Kind Code:
B2
Abstract:
A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, and a third lens unit having positive refractive power, wherein at least the first to third lens units move during zooming from a wide-angle end to a telephoto end, and a focal length f2 of the second lens unit, a focal length ft of the entire zoom lens at the telephoto end, and a refractive index Nd2n of a lens having negative refractive power closest to the object side included in the second lens unit are appropriately set.
Inventors:
Hideki Sakai
Application Number:
JP2012123562A
Publication Date:
August 02, 2016
Filing Date:
May 30, 2012
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2013228500A | ||||
| JP2013178298A | ||||
| JP2013152373A | ||||
| JP2010124335A | ||||
| JP2009294513A | ||||
| JP2012098699A |
Foreign References:
| WO2012102105A1 |
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa