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:
Jul. 25, 2017
Filed:
Feb. 26, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Hirofumi Abe, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens includes: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; and a fifth lens unit having a positive refractive power or a negative refractive power, in which the first lens unit and the fifth lens unit do not move for zooming, and the second lens unit and the fourth lens unit move during zooming, in which a focal length fw of the zoom lens at a wide angle end, a focal length f2 of the second lens unit, and a focal length of a positive lens, which is included in the second lens unit are suitably set.