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 JP4909089
Kind Code:
B2
Abstract:
A zoom lens system includes a first lens unit having a negative optical power and a second lens unit having a positive optical power in order from the object side to the image side. In a zooming operation, the distance between the first lens unit and the second lens unit at the telephoto end is smaller than that at the wide angle end. The first lens unit includes a single negative lens element and a single positive lens element, and materials of the lens elements are adequately set.
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Inventors:
Norihiro Namba
Application Number:
JP2007000541A
Publication Date:
April 04, 2012
Filing Date:
January 05, 2007
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18; G02B15/16
Domestic Patent References:
| JP2007179015A |
Attorney, Agent or Firm:
Yukio Takanashi