The high-index Visolett magnifier (index, 1.806) is an optically designed glass paperweight magnifier. It magnifies 2.49x, is 32mm in diameter, nonfocusable, and rests on paper. All Visoletts commercially available are made of crown glass (index, 1.523). The 32mm high-index Visolett has become commercially available recently. The use of high-index material increases the image size by 39%.
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