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Buying Magnifiers and Loupes

Magnifiers Magnifiers, whether pocket, handheld, loupe or hands free all follow some basic rules of optics. When ordering, keep these rules in mind. As magnification goes up in a magnifier, lens size goes down. A 2x magnifier, such as the Bausch & Lomb 2" x 4" Rectangular 2x has a lens size of 4 inches. This is suitable for reading a book or text or just taking a look at things in general. On the other hand, a 10x magnifier, such as the Nikon 10x Jewelry Loupe Jeweler Pocket Round Magnifier - 6947 has a lens size of about a 1/2...