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:
Aug. 30, 2016
Filed:
Jun. 15, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Isamu Izuhara, Osaka, JP;
Akihiro Ishida, Osaka, JP;
Abstract
A zoom lens system, in order from an object side to an image side, comprising: a negative first lens unit; a positive second lens unit; a negative third lens unit; and a positive fourth lens unit, wherein the first, second and third lens units move along an optical axis in zooming, the third lens unit moves along the optical axis in focusing, and the conditions: 2.5≦|(1−(β))×(β)|≦7.0 and 0.5≦Bf/f≦4.0 (β: a lateral magnification of the third lens unit at an infinite object point distance at the telephoto limit, β: a lateral magnification of the fourth lens unit at an infinite object point distance at the telephoto limit, Bf: a back focal length of the zoom lens system at the wide-angle limit, f: a focal length of the zoom lens system at the wide-angle limit) are satisfied.