Title:
ズームレンズおよび撮像装置
Document Type and Number:
Japanese Patent JP7387425
Kind Code:
B2
Abstract:
To provide a zoom lens that is advantageous in terms of its high variable power ratio, small size, and high optical performance over the entire zoom area.SOLUTION: A zoom lens is composed of a first lens group L1 having a positive refractive power, a second lens group L2 having a negative refractive power, a third lens group L3 having a positive refractive power, and one or more subsequent lens groups, which are arranged in order from an object side to an image side, and the first lens group does not move for zooming and the interval between the combinations of the adjacent lens groups is changed. The first lens group has at least one positive lens formed of a material having an Abbe number of less than 30. The distance on an optical axis from a surface on the most object side to a surface on the most image side of the first lens group, the focal distance of the first lens group, the focal distance of the zoom lens at a telephoto end, and the focal distance of the zoom lens at a wide angle end, are appropriately set.SELECTED DRAWING: Figure 1
Inventors:
Kenta Sudo
Application Number:
JP2019234095A
Publication Date:
November 28, 2023
Filing Date:
December 25, 2019
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20
Domestic Patent References:
| JP2012242766A | ||||
| JP2014038235A | ||||
| JP2012123031A | ||||
| JP2011081110A | ||||
| JP2012203296A | ||||
| JP2001021804A |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Tomoya Hirayama
Atsuya Mizumoto
Tomoya Hirayama
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