发明名称 |
Telephoto lens system having an improved focusing arrangement |
摘要 |
A focusing method for a telephoto lens system comprising a front lens group having positive refractive power, an intermediate lens group having negative refractive power, and a rear lens group having positive refractive power, the focusing method for a telephoto lens system being arranged to focus the telephoto lens system by moving the intermediate lens group toward the image side and the rear lens group toward the object side.
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申请公布号 |
US4609263(A) |
申请公布日期 |
1986.09.02 |
申请号 |
US19840576898 |
申请日期 |
1984.02.03 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
IMAIZUMI, MASAKI |
分类号 |
G02B13/02;(IPC1-7):G02B13/02 |
主分类号 |
G02B13/02 |
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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