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 JP4902191
Kind Code:
B2
Abstract:
At least one exemplary embodiment is directed to a zoom lens system, which includes a first, a second, a third, and a fourth lens units of positive, negative, positive, and positive refractive powers, respectively, in this order from an object side to an image side. At a telephoto end, the first lens unit is closer to the object side, a distance between the first and second lens units is larger, a distance between the second and third lens units is smaller, and a distance between the third and fourth lens units is larger, as compared to those at a wide-angle end. The first lens unit includes negative and positive lens elements. The second lens unit includes negative and positive lens elements in this order from the object side to the image side.
Inventors:
Yoshiki Ito
Application Number:
JP2005366407A
Publication Date:
March 21, 2012
Filing Date:
December 20, 2005
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP312625A | ||||
| JP9184982A |
Attorney, Agent or Firm:
Yukio Takanashi