发明名称 Focus lens apparatus
摘要 Provided is a zoom lens including: a focus lens unit which moves during focusing; and a magnification-varying lens unit which moves during zooming, in which when the magnification-varying lens unit is moved in a direction in which a depth of focus deepens, a focus operation using the focus lens unit is stopped.
申请公布号 US8027098(B2) 申请公布日期 2011.09.27
申请号 US20090560741 申请日期 2009.09.16
申请人 CANON KABUSHIKI KAISHA 发明人 SAKAMOTO MASAYUKI
分类号 G02B15/14;G02B7/02 主分类号 G02B15/14
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