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:
Mar. 24, 2009
Filed:
Sep. 07, 2006
Hiroki Harada, Ichikawa, JP;
Hiroki Harada, Ichikawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Providing a zoom lens system having higher optical performance, a wide, maximum angle of view of 80 degrees or more, a zoom ratio of about 2.7, and a fast aperture ratio with an f-number of about 2.8. The zoom lens system includes, in order from an object, a first lens group Ghaving negative refractive power, a second lens Ggroup having positive refractive power, a third lens group Ghaving negative refractive power, a fourth lens group Ghaving positive refractive power; and a fifth lens group Ghaving positive refractive power. When zooming from a wide-angle end state W to a telephoto end state T, the first through fourth lens groups are moved, and the fifth lens group is fixed. Given conditional expressions are satisfied.