Zoom lens and image pickup apparatus including the
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专利名称：Zoom lens and image pickup apparatus
including the same
发明人：Yasuaki Hagiwara
申请号：US15629003
申请日：20170621
公开号：US10594944B2
公开日：
20200317
专利内容由知识产权出版社提供
专利附图：
摘要：Provided is a zoom lens, including, in order from an object side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a negative fourth lens unit,and a positive fifth lens unit, in which an interval between each pair of adjacent lens units
is changed during zooming, in which the second lens unit moves during focusing, and includes, in order from the object side to the image side, a negative lens, a negative lens, a positive lens, and a negative lens, and in which a focal length of the second lens unit, a thickness of the second lens unit on an optical axis, a refractive index of a material of the positive lens included in the second lens unit, and an average value of refractive indices of materials of the negative lenses included in the second lens unit are each appropriately set.
申请人：CANON KABUSHIKI KAISHA
地址：Tokyo JP
国籍：JP
代理机构：Carter, DeLuca & Farrell LLP
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