Title:
ZOOM LENS AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2023072954
Kind Code:
A
Abstract:
To ensure a small size, light weight, high specification, and a high optical performance in a zoom lens.SOLUTION: A zoom lens has a positive first lens group L1 immovable for zooming, a negative second lens group L2 moving in zooming, at least two lens groups L3, L4 moving in zooming, a positive final lens group L5 immovable for zooming, and an aperture stop SP arranged between the second lens group and the final lens group and moving during a magnification change. A lens group moving in focusing is a sub lens group closer to an image side than an immovable sub lens group on the most object side in the first lens group. The second lens group has a first negative lens on the most object side, at least one negative lens other than the first negative lens, and at least one positive lens. An Abbe number νd21 based on a d-line of the first negative lens and an average Abbe number νd2Nave of the negative lenses other than the first negative lens in the second lens group satisfy conditions of 60≤νd21≤105 and 30≤νd2Nave≤65.SELECTED DRAWING: Figure 1
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Inventors:
IMOTO YU
Application Number:
JP2021185712A
Publication Date:
May 25, 2023
Filing Date:
November 15, 2021
Export Citation:
Assignee:
CANON KK
International Classes:
G02B15/20
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Tomoya Hirayama
Atsuya Mizumoto
Tomoya Hirayama
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