Achromatic lens: Limits the effects of chromatic and spherical aberration and eliminates color fading. Excellent color clarity and transparency. Magnifiers designed for hobbyists and professionals. 10X magnification with LED and UV light, 22mm lens diameter, 3-piece lens, achromatic optical glass, metal body. Uses: For jewelers, machinists, stamp and coin collectors, artisans, photographers, hobbyists, watchmakers, and others who need to make microscopic observations of target objects.