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 having two positive lenses and a negative lens; a negative second lens unit having positive and negative lenses; a positive third lens unit; and a rear group including lens unit, wherein: with respect to a wide angle end, at a telephoto end, intervals between the first and second lens units, the second and third lens units, and the third lens unit and the rear group respectively change; and a focal length and an Abbe number of a material of the positive lens of the first lens unit that has a largest Abbe number among positive lenses, a refractive index and an Abbe number of a material of the positive lens of the second lens unit, and a focal length of the first lens unit are set appropriately.
申请公布号 US8314996(B2) 申请公布日期 2012.11.20
申请号 US20100940278 申请日期 2010.11.05
申请人 NANBA NORIHIRO;CANON KABUSHIKI KAISHA 发明人 NANBA NORIHIRO
分类号 G02B15/14 主分类号 G02B15/14
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