Zoom lens and imaging apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 16, 2016
Grant Date -
Apr 2, 2015
app pub date -
Dec 9, 2014
filing date -
Jun 12, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The zoom lens substantially consists of a positive first lens group fixed while changing magnification, a negative second lens group which moves from the object side to the image side while changing magnification, a positive third lens group which moves while changing magnification, and a positive fourth lens group which moves from the image side to the object side while changing magnification, and a positive fifth lens group fixed while changing magnification in this order from the object side. A floating system in which the third lens group and the fourth lens group move relative to each other while changing magnification is adopted. The image formation magnification rates of the combined lens group formed by the third lens group and the fourth lens group together and the second lens group simultaneously pass −1× point while changing magnification from the wide angle end to the telephoto end.
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