Zoom lens system
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United States of America Patent
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Jul 11, 2017
Grant Date -
Apr 13, 2017
app pub date -
Oct 12, 2015
filing date -
Oct 12, 2015
priority date (Note) -
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Abstract
A zoom lens system includes a first lens group of negative refractive power and a second lens group of positive refractive power. The first lens group includes a first lens of negative refractive power, and the second lens group is disposed between the first lens group and a reduced side and includes in order from a magnified side to the reduced side a second lens of positive refractive power, a third lens of positive refractive power, a fourth lens of negative refractive power, and a fifth lens of positive refractive power. At least one of the first lens to the fifth lens is an aspherical lens having at least one aspherical surface.
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