Ruper 10x magnification hand lens with a generous 20 mm diameter viewing field. Manufactured in Japan, Ruper loupes are world renowned for their robust build and quality optics. In the case of this model, the magnifier is made with aplantic doublet optics and so significantly reduces spherical abrasions when observing items. These high end lenses are suitable not only for students but professionals in the acedemic and industrial sectors, especially geologists, botanists, entomologists, archaeologists, gemologists, jewelers and those with an interest in antiques. An excellent entry level professional magnifier lens.