Zoom lens and image pickup apparatus including the same
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United States of America Patent
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Sep 11, 2018
Grant Date -
Mar 2, 2017
app pub date -
Aug 30, 2016
filing date -
Sep 2, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units. For zooming, the first to third lens units move, thereby changing intervals between adjacent ones of these lens units. For the zoom lens, a focal length (f1) of the first lens unit, focal lengths (fw, ft) of the zoom lens at a wide angle end and at a telephoto end, respectively, and amounts (M2, M3) by which the second and third lens units, respectively, move when zooming from the wide angle end to the telephoto end are appropriately defined.
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