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:
Sep. 21, 2021
Filed:
Mar. 24, 2020
Fujifilm Corporation, Tokyo, JP;
Takuya Tanaka, Saitama, JP;
Takuya Tanaka, Saitama, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the second lens group, the third lens group, and the fourth lens group move. The fourth lens group includes a plurality of positive lenses and a negative lens disposed on a most-image-side. Assuming that an average value of Abbe numbers in positive lenses within the fourth lens group is vdp and an Abbe number of a negative lens disposed on a most-image-side of the fourth lens group is vdn, the zoom lens satisfies a conditional expression: 0<vdp−vdn<15.