Zoom lenses and image pickup apparatus including the zoom lenses
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United States of America Patent
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Jul 25, 2017
Issued Date -
N/A
app pub date -
Dec 4, 2015
filing date -
Dec 9, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A zoom lens include, from an object side, a first magnification-varying group, an aperture stop and a second magnification-varying group, the first magnification-varying group including: a positive first lens unit configured not to move for zooming; a negative second lens unit configured to move during zooming; and one or more magnification-varying lens units configured to move during zooming, the magnification-varying lens units having a positive combined refractive power, the second magnification-varying group including: a negative first sub lens unit configured not to move for zooming; a negative second sub lens unit configured to move during zooming; and a positive third sub lens unit, the second magnification-varying group moving the second sub lens unit to the image side to displace a focal length range of the entire system toward a long focal length side.
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