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 JP4585796
Kind Code:
B2
Abstract:
Disclosed is a zoom lens system including in an 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 zooming is performed by changing each distance among the first, second, and third lens units. In this zoom lens system, partial charge of a changing magnification between the second and third lens units is suitably set to maintain excellent optical performance over the overall zoom area while a zoom ratio is large.
Inventors:
Hiroshi Saruwatari
Application Number:
JP2004167214A
Publication Date:
November 24, 2010
Filing Date:
June 04, 2004
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B9/12; G02B13/18; G02B15/14; G02B15/177
Domestic Patent References:
| JP2000111798A | ||||
| JP2004102211A | ||||
| JP2000267009A | ||||
| JP2000009999A | ||||
| JP2004258311A |
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa