Invention Application
- Patent Title: Wide-Angle Zoom Lens and Image Pickup Apparatus
- Patent Title (中): 广角变焦镜头和图像拾取装置
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Application No.: US14990207Application Date: 2016-01-07
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Publication No.: US20160202457A1Publication Date: 2016-07-14
- Inventor: Dayong Li
- Applicant: Tamron Co., Ltd.
- Priority: JP2015-002368 20150108
- Main IPC: G02B15/177
- IPC: G02B15/177 ; G02B15/20 ; G02B27/64

Abstract:
A wide-angle zoom lens includes: a first lens group having a negative refractive power, a second lens group having positive refractive power, a third lens group having a negative refractive power and a fourth lens group having a positive refractive power in that order from an object side. The second lens group is configured with a front group, a stop and a rear group having a positive refractive power in that order from the object side. Magnification change is performed by changing distances among the lens groups.
Information query