This inexpensive Economy Eye Loupe features one 15X magnifier and one 20X magnifier, each made from two optically ground glass lenses. The magnifiers easily swing in or out from the chrome plated brass case. Includes case.
Size: 2-1/4" long x 1" wide.
Lens diameters: 1/4" & 1/2"
Magnification: 15X & 20X
Why do I need this item? This is an essential item for viewing diamonds, gem stones or other small objects.
A Coddington magnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting the rays to those close to the axis, which again minimizes spherical aberration