Zoom lens and image pickup apparatus including the same
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United States of America Patent
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Jan 31, 2017
Grant Date -
Aug 20, 2015
app pub date -
Jan 30, 2015
filing date -
Feb 14, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a zoom lens including a plurality of lens units, in which an interval between adjacent lens units changes during zooming. The zoom lens includes: a first lens subunit having a positive refractive power; a second lens subunit having a positive refractive power, which is arranged adjacent to an image side of the first lens subunit; and at least one lens unit on an object side of the first lens subunit. Lens systems arranged on the object side of the first lens subunit have a negative combined focal length over an entire zoom range. The second lens subunit moves along an optical axis to the image side during focusing from an object at infinity to a proximate object. A focal length of the first lens subunit and a focal length of the second lens subunit are appropriately set.
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