发明名称 Zoom lens and image pickup apparatus including the same
摘要 Provided is a zoom lens including, in order from an object side to an image side: a positive first lens unit without moving for zooming; a negative second lens unit moving during zooming; a negative third lens unit moving during zooming; a positive fourth lens unit moving during zooming; and a positive fifth lens unit without moving for zooming, in which the second lens unit moves to the image side during zooming from a wide angle end to a telephoto end, while the third lens unit moves along a locus convex toward the object side, and, when fw denotes a focal length of the entire system at the wide angle end, Z a zoom ratio, and fz a focal length of the entire system at a zoom position where the third lens unit is in the position closest to the object side, the following conditional expression is satisfied: fw×Z0.07<fz<fw×Z0.5.
申请公布号 US8179609(B2) 申请公布日期 2012.05.15
申请号 US20100906344 申请日期 2010.10.18
申请人 WAKAZONO TSUYOSHI;CANON KABUSHIKI KAISHA 发明人 WAKAZONO TSUYOSHI
分类号 G02B15/17;G02B15/14;H04N5/262 主分类号 G02B15/17
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