Zoom lens and image pickup apparatus including the same
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United States of America Patent
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May 7, 2013
Grant Date -
Feb 10, 2011
app pub date -
Jul 27, 2010
filing date -
Aug 6, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A zoom lens includes, from an object side to an image side, first to fifth lens units having positive, negative, positive, negative, and positive refractive powers. A distance between the first and second lens units is longer, a distance between the second and third lens units is shorter, and a distance between the fourth and fifth lens units is longer at a telephoto end than at a wide angle end, and a distance between the third and fourth lens units differs between the telephoto end and the wide angle end. Focal lengths of the first and fourth lens units and the entire zoom lens at the wide angle end, a moving amount of the first lens unit during zooming, and a distance from a lens surface closest to the object side in the first lens unit to an image plane at the wide angle end are set properly.
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