Title:
ズームレンズ及びそれを用いた撮像装置
Document Type and Number:
Japanese Patent JP6555976
Kind Code:
B2
Abstract:
A zoom lens according to the present invention includes, in order from an object side to an image side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, in which a distance between adjacent lens units varies during zooming, the configuration of the second lens unit, the curvature radius Rb2obj of a lens surface of a cemented lens GRb2 on the object side included in the second lens unit, the curvature radius Rb2img of a lens surface of the cemented lens GRb2 on the image side, the focal length f2bimg of the cemented lens GRb2, and the focal length f2 of the second lens unit are appropriately set.
Inventors:
Takeshi Shinohara
Application Number:
JP2015158018A
Publication Date:
August 07, 2019
Filing Date:
August 10, 2015
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP348807A | ||||
| JP2001272602A | ||||
| JP201181185A | ||||
| JP200858845A | ||||
| JP2002196238A | ||||
| JP2006154172A |
Attorney, Agent or Firm:
Yukio Takanashi