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:
Nov. 13, 2018
Filed:
Jul. 11, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Yoshihisa Tashiro, Nikko, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens includes, in order from an object side to an image side, first to fifth lens units respectively having positive, negative, positive, positive, and negative refractive powers. The first lens unit does not move for zooming, and each of the distances between the lens units adjacent to each other is changed during zooming. Lateral magnifications β2w and β2t of the second lens unit at a wide angle end and a telephoto end, respectively, lateral magnifications β3w and β3t of the third lens unit at the wide angle end and the telephoto end, respectively, lateral magnifications β4w and β4t of the fourth lens unit at the wide angle end and the telephoto end, respectively, a focal length f5 of the fifth lens unit, and an amount of movement M5 of the fifth lens unit in zooming from the wide angle end to the telephoto end are appropriately set.