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US Patent 7251080 Zoom lens system

Patent 7251080 was granted and assigned to Pentax on July, 2007 by the United States Patent and Trademark Office.

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent
1

Patent attributes

Current Assignee
Pentax
Pentax
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
72510801
Patent Inventor Names
Takashi Enomoto1
Date of Patent
July 31, 2007
1
Patent Application Number
111879691
Date Filed
July 25, 2005
1
Patent Primary Examiner
‌
Alicia M Harrington
1
Patent abstract

A zoom lens system includes a negative first lens group, a diaphragm, and a positive second lens group, in this order from the object. Zooming is performed by moving the negative first lens group and the positive second lens group along an optical axis of the zoom lens system. The negative first lens group includes a negative first lens element, a negative second lens element, and a positive third lens element, in this order from the object.

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