发明名称 |
Zoom lens and image pickup apparatus |
摘要 |
The present invention provides a zoom lens provided with, in order from an object side: a first lens group having a positive refractive power whose position on the optical axis is fixed during a zooming operation and a focusing operation; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power. The first lens group includes a reflection optical element. At least the fifth lens group is used for focusing on an object at a finite distance. The maximum lateral magnification of the predetermined lens groups between a wide-angle end and a telephoto end of the zoom lens and focal lengths of the zoom lens satisfy a predetermined condition.
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申请公布号 |
US7312931(B2) |
申请公布日期 |
2007.12.25 |
申请号 |
US20060526640 |
申请日期 |
2006.09.26 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
SANO EIGO;YAMASHITA ATSUSHI |
分类号 |
G02B15/14 |
主分类号 |
G02B15/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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