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:
Feb. 10, 2015
Filed:
Jun. 04, 2012
Takashi Okada, Saitama, JP;
Takashi Okada, Saitama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens includes, in order from an object side to an image side, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a reflective unit configured to bend an optical axis, and a rear lens group including two or more lens units, the reflective unit being stationary during zooming, the first and second lens units and two or more lens units of the rear lens group being moved during zooming, wherein the following conditions are satisfied: 4.3<β2t/β2w<12.0, and 2.1<βRt/βRw<3.0, where β2w and β2t denote lateral magnifications of the second lens unit at a wide-angle end and a telephoto end, respectively, and βRw and βRt denote lateral magnifications at the wide-angle end and the telephoto end, respectively, of a lens unit having a greatest variable power contribution out of the rear lens group.