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:
Apr. 27, 2010
Filed:
Nov. 17, 2008
Masashi Hankawa, Shibuya-ku, JP;
Tomoyuki Satori, Shibuya-ku, JP;
Masashi Hankawa, Shibuya-ku, JP;
Tomoyuki Satori, Shibuya-ku, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
The invention relates to a zoom lens and an imaging apparatus incorporating the same. The zoom lenses comprises, in order from its object side, a positive first lens group G, a negative second lens group G, a positive third lens group G, and a positive fourth lens group G. Zooming is implemented by changing the spacing between the respective lens groups. Upon received in a lens mount, the third lens group is shifted and positioned while its optical axis is tilted at an angle of ±45° with those of other lens groups or placed substantially horizontal. At least one of lenses in the second lens group Gor the fourth lens group Gis configured such that a portion of that lens proximate to the third lens group being received in the lens mount is cut away. The following condition (1) is satisfied:0.3×()<3.0  (1)where d is a distance between the center point of axial thickness of the third lens group being received in the lens mount and the optical axis, Fis an F-number at a telephoto end, and fis a focal length at the telephoto end.