Zoom lens and image pickup apparatus including the same
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United States of America Patent
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Dec 26, 2017
Issued Date -
N/A
app pub date -
Aug 17, 2015
filing date -
Aug 21, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a zoom lens, comprising, in order from an object side to an image side, first to fourth lens units having positive, negative, positive, and positive refractive powers. During zooming, first lens unit does not move, and second to fourth lens units move. Third lens unit comprises, in order from the object side to the image side, first and second lens subunits each having a positive refractive power. Second lens subunit moves in a direction having a component of a direction perpendicular to an optical axis during image blur correction. Third lens unit comprises at least two positive lenses and at least two negative lenses. Second lens subunit comprises a positive lens and a negative lens. A focal length (f2) of second lens unit, a focal length (f3) of third lens unit, and a focal length (f3b) of second lens subunit are each appropriately set.
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