20X inspection loupe for laser inscriptions on diamonds

Summary 20X12 The 'standard' magnification for a loupe (for jewellery & gemstones, stamps & coins) is 10X. This one is 20X The diameter of the lens is 12mm* * useable diameter of this lens (allowing for the rim that holds the lens in place) 11mm Too see reviews of loupes, click here Detail 20X12 triplet loupe on a stand that holds a ring. Normally I advise against 20X loupes, they are too strong and unnecessary, and they are too fiddly to focus. None of that applies to this loupe! A very rare use for a 20X loupe is to read some laser-engraved serial numbers on the edge (girdle) of a diamond - some of these are simply too small to see with 10X magnification, it is necessary to use 20X. Under normal circumstances focusing a 20X is painful, you move it 2mm too close to the object or 2mm too far way, and it goes out of focus. Not so here - because the holder is designed to hold a ring so that the diamond is exactly parallel to the lens. You then turn the base to focus, then rotate the platform to get the best view. Read all about magnification and how to choose a magnifier, click here. Further information Everything you need to know about magnifiers and magnification. See information about (and reviews of) loupes (small high-power folding jewellers' magnifiers). See information about (and reviews of) binocular (head-worn) magnifiers- especially the surgeons-type. See a guide to magnifiers for the partially-sighted. See loupes with UV lights. Video (electronic) magnifiers, video magnifiers compared. Products: see pocket microscopes and phone microscopes, click here. With most magnifiers* magnification and working distance are related. Download our Excel sheet, enter a magnification to see the resulting working distance, enter a working distance to see the resulting magnification. * excluding surgeons-type, digital & phone magnifiers, and microscopes.