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. 02, 2013
Filed:
Aug. 05, 2009
Mami Muratani, Tokyo, JP;
Haruo Sato, Kawaguchi, JP;
Mami Muratani, Tokyo, JP;
Haruo Sato, Kawaguchi, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens system ZL mounted in an electronic still cameraetc is constructed to include, in order from an object side, a first lens group Ghaving negative refractive power and a second lens group Ghaving positive refractive power, in which the second lens group Ghas two cemented lenses. A distance between the first lens group Gand the second lens group Gchanges when a lens position state changes from a wide-angle end state to a telephoto end state, thereby providing the zoom lens system exhibiting preferable optical performance, an optical apparatus including the zoom lens system and a magnification varying method using the zoom lens system.