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. 11, 2014
Filed:
Jul. 20, 2011
Toyokatsu Fujisaki, Utsunomiya, JP;
Toyokatsu Fujisaki, Utsunomiya, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
Provided is a zoom lens system including, in order from an object side to an image side: a first lens unit having positive refractive power; a second lens unit having negative refractive power; a prism for bending an optical path; and a rear group including a plurality of lens units, in which the first lens unit is moved to the object side while the second lens unit is moved to the image side with respect to an imaging plane at a telephoto end compared to at a wide angle end, and movement amounts Mand Mof the first lens unit and the second lens unit with respect to an image plane in zooming from the wide angle end to the telephoto end, a focal length f2 of the second lens unit, and a focal length ft of an entire system at the telephoto end are respectively set appropriately.