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. 09, 2019
Filed:
May. 22, 2016
Nikon Corporation, Minato-ku, Tokyo, JP;
Yasufumi Nishi, Edinburgh, GB;
Nikon Corporation, Tokyo, JP;
Abstract
In a zoom lens comprising a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, a fourth lens group (G) having negative refractive power, and a fifth lens group (G) having positive refractive power, the first to fifth lens groups (Gto G) are respectively moved along the optical axis so that a distance between the first lens group (G) and the second lens group (G), a distance between a distance between the second lens group (G) and the third lens group (G), a distance between the third lens group (G) and the fourth lens group (G), a distance between the fourth lens group (G) and the fifth lens group (G) respectively changes upon zooming from a wide-angle end state to a telephoto end state, so that a conditional expression '0.25<f1−/ft<0.38' is satisfied.