The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
Apr. 18, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shohei Kikuchi, Saitama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a zoom lens including, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a rear lens group including a plurality of lens units. The zoom lens has a configuration in which an interval between each pair of adjacent lens units is changed for zooming. The first lens unit is configured to move for zooming. The rear lens group includes at least one lens unit having a negative refractive power. Further, a focal length of the first lens unit, a focal length of the second lens unit, a focal length of the zoom lens at the wide angle end, a total length of the zoom lens at the wide angle end, and a back focus at the wide angle end are each appropriately set.