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<p>[QUOTE=&quot;desertgem, post: 2889056, member: 15199&quot;]Loupes/magnifiers&nbsp; are usually poor ( single piece of glass or plastic), sufficient ( achromatic ( 2 or more pieces of glass to reduce distortion ( esp. of colors) often called a doublet)) or best ( apochromatic&nbsp; or Triplets) made of 3 or more pieces of glass to almost eliminate distortion. They may contain LD or ED glass ( Low or extra low dispersion or Lanthanum oxide or other rare earth glass, although some are slightly radioactive, but not a health hazard.&nbsp; Ask an Astronomer or photographer as they pay big bucks for high definition lens.</p><p><br /></p><p>But that aside, most triplets would provide satisfactory/price ratios. I like and have several of the various powers of the Belomo lenses , Amazon has great prices on them. I use mainly the 7x or 10X, I thought about getting the 20X, but using the 10X takes a very steady hand/eye co-ordination, maybe with my elbows on a solid table for the 20X.&nbsp; Some do not like the product as they are from Belarus.</p><p><a href="https://www.amazon.com/BelOMO-Triplet-Loupe-Folding-Magnifier/dp/B00EXPWU8S/ref=pd_sim_229_1?_encoding=UTF8&amp;psc=1&amp;refRID=16JSTP6VPAACBQWVNTRA" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.amazon.com/BelOMO-Triplet-Loupe-Folding-Magnifier/dp/B00EXPWU8S/ref=pd_sim_229_1?_encoding=UTF8&amp;psc=1&amp;refRID=16JSTP6VPAACBQWVNTRA" rel="nofollow">https://www.amazon.com/BelOMO-Triplet-Loupe-Folding-Magnifier/dp/B00EXPWU8S/ref=pd_sim_229_1?_encoding=UTF8&amp;psc=1&amp;refRID=16JSTP6VPAACBQWVNTRA</a>[/QUOTE]</p><p><br /></p>

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