Invention Grant
- Patent Title: Zoom lens and imaging apparatus
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Application No.: US15962509Application Date: 2018-04-25
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Publication No.: US10606044B2Publication Date: 2020-03-31
- Inventor: Keisuke Okada
- Applicant: Tamron Co., Ltd.
- Applicant Address: JP Saitama-shi
- Assignee: Tamron Co., Ltd.
- Current Assignee: Tamron Co., Ltd.
- Current Assignee Address: JP Saitama-shi
- Agency: The Webb Law Firm
- Priority: JP2017-153069 20170808
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B27/00 ; G02B7/14 ; H04N5/335 ; G02B13/06 ; H04N5/225 ; G02B7/04 ; G02B15/173

Abstract:
An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
Public/Granted literature
- US20190049706A1 Zoom Lens and Imaging Apparatus Public/Granted day:2019-02-14
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