Title:
ズームレンズおよび撮像装置
Document Type and Number:
Japanese Patent JP7134757
Kind Code:
B2
Abstract:
To provide a zoom lens which is advantageous in that it offers a wide view angle, a high zoom ratio, and high optical performance over an entire zoom range.SOLUTION: A zoom lens provided herein comprises a first lens group L1 having positive refractive power, a second lens group L2 having negative refractive power, and at least one lens group L3, L4 configured to move for zooming in order from the object side to the image side, and is configured such that a distance between each pair of adjacent lens groups changes for zooming. The zoom lens satisfies the following conditional expressions: θgFn-(-1.6650×10×νdn+5.2130×10×νdn-5.6560×10×νdn+0.7370)>0, 0.5450<θgFn, 50.0<νdn<85.0, where νdn and θgFn represent an Abbe number and partial dispersion ratio of a negative lens of the second lens group L2, respectively.SELECTED DRAWING: Figure 1
Inventors:
Hiroshi Iriyama
Application Number:
JP2018133160A
Publication Date:
September 12, 2022
Filing Date:
July 13, 2018
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/167; G02B13/18; G02B15/20
Domestic Patent References:
| JP2012113139A | ||||
| JP2017040769A | ||||
| JP2014010282A |
Foreign References:
| WO2017130479A1 |
Attorney, Agent or Firm:
Takuma Abe
Sougo Kuroiwa
Sougo Kuroiwa