Title:
ズームレンズ系、撮像装置及びカメラ
Document Type and Number:
Japanese Patent JP5530868
Kind Code:
B2
Abstract:
A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein the zoom lens system, in order from the object side to the image side, comprises: a first lens unit having positive optical power and comprising four lens elements; a second lens unit having negative optical power; and a third lens unit having positive optical power; wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit is moved along an optical axis direction so as to achieve variable magnification, and wherein the conditions are satisfied: 0.3020.5 (f1 is a composite focal length of the first lens unit, fW is a focal length of the entire system at a wide-angle limit, and fT is a focal length of the entire system at a telephoto limit), an imaging device and a camera are provided.
Inventors:
Kyoichi Mito
Miyatake Yoshito
Main protection
Miyatake Yoshito
Main protection
Application Number:
JP2010199902A
Publication Date:
June 25, 2014
Filing Date:
September 07, 2010
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2010054667A | ||||
| JP2009251280A | ||||
| JP2008281927A | ||||
| JP2007003554A | ||||
| JP2009047903A | ||||
| JP2008292733A | ||||
| JP2009042271A | ||||
| JP2002372667A | ||||
| JP2005181499A | ||||
| JP2001108895A |
Attorney, Agent or Firm:
Patent business corporation Ogasawara patent office
Kaoru Kuwahara
Takeji Takada
Kaoru Kuwahara
Takeji Takada
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