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 JP6566661
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens that has a wide viewing angle, a high zoom ratio, and a compact entire lens system, can perform rapid focusing, and has high optical performance over an entire object distance and an entire zoom range.SOLUTION: A zoom lens includes, in order from an object side to an image side, a first lens group having positive refractive power, a second lens group having negative refractive power, and one or more lens groups, and has, as a whole, an intermediate group having positive refractive power, a lens group NF having negative refractive power, and a lens group PL having positive refractive power. A distance between the lens groups adjacent to each other changes during zooming. The intermediate group is, in order from the object side to the image side, composed of a portion group P1 having positive refractive power, a portion group N1 having negative refractive power, and a portion group P2 having positive refractive power. The zoom lens individually sets: a lateral magnification βnw of the portion group N1 when it is focusing at infinity at a wide angle end; and a lateral magnification βlw of an optical system disposed closer to the image side than the portion group N1 when it is focusing at infinity at the wide angle end.SELECTED DRAWING: Figure 1
Inventors:
Shinichiro Saito
Application Number:
JP2015043163A
Publication Date:
August 28, 2019
Filing Date:
March 05, 2015
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2014228710A | ||||
| JP2014219616A | ||||
| JP2014106424A | ||||
| JP2007264174A | ||||
| JP2015001550A | ||||
| JP2014098795A | ||||
| JP2014145960A | ||||
| JP2012047814A |
Foreign References:
| WO2012101959A1 | ||||
| US20140176778 |
Attorney, Agent or Firm:
Yukio Takanashi