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Lenses are made of CR-39 which provides vastly superior optics, rating just one rung below the material with the highest ABBE value: crown glass.
CR-39 stands for Columbia Resin #39. This stems from it being the 39th formula of the thermosetting plastic developed by the Columbia Resins Project in 1940.
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Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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