Originally posted by bob p
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The magnification is much higher than readers or the OptiVisor - I think that they are intended for jewelers and hobbyists. @@@
4 Pairs of replaceable lens included, with different magnifications (10X, 15X, 20X, 25X), can be interchanged quickly; Too high magnification can not to reading books...
short focal distance from lens to product is 0.2-2in (0.5-5cm), just like the principle of microscope
short focal distance from lens to product is 0.2-2in (0.5-5cm), just like the principle of microscope
@@@ EDIT: I meant to type ... and not hobbyists. My bad!
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