发明授权
- 专利标题： Zoom lens system
- 专利标题（中）： 变焦镜头系统
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申请号： US09173714申请日： 1998-10-16
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公开(公告)号： US06172819B2公开(公告)日： 2001-01-09
- 发明人: Takashi Enomoto , Takayuki Ito
- 申请人： Takashi Enomoto , Takayuki Ito
- 优先权： JP9-288332 19971021
- 主分类号： G02B1514
- IPC分类号： G02B1514
摘要：
A zoom lens system which includes a positive first lens group and a negative second lens group, in this order from the object side; wherein zooming is performed by moving the first lens group and the second lens group, and by varying the distance between the first lens group and the second lens group; wherein the zoom lens system satisfies the following condition: −7.0
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