Zoom lens and image pickup apparatus including the same
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United States of America Patent
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Feb 28, 2017
Grant Date -
May 14, 2015
app pub date -
Nov 7, 2014
filing date -
Nov 12, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a zoom lens, including, in order from an object side to an image side: a positive first lens unit that does not move for zooming; a negative second lens unit that moves during zooming; and a positive N-th lens unit that does not move for zooming and is arranged closest to the image side. Among lenses constructing the second lens unit, two lenses closest to the image side are a positive lens and a negative lens, and partial dispersion ratios for g-line and F-line and Abbe numbers for a d-line of the positive and negative lenses, and an average value of refractive indices of all the lenses of the second lens unit are appropriately set.
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Cited Art Landscape
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