Converter lens system
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United States of America Patent
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Dec 26, 2017
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app pub date -
Feb 20, 2015
filing date -
Mar 3, 2014
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Abstract
There is provided converter lens system including a first lens that is a negative lens of which both surfaces are concave, a second lens that is a negative lens of which both an image plane side and an object side are convex toward an object side, and a third lens that is a positive lens of which both sides are convex. The first to third lenses are disposed in this order from the object side, and the converter lens system is inserted and used between an imaging lens and a camera.
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