The Optical Glass Lenses Set for physical science and physics over all of the permutations of curvature from positive power biconvex to negative power biconcave.
Set of six glass, optical lenses. Lenses included:
(1) double convex
(1) plano convex
(1) converging concave convex
(1) diverging concave convex
(1) double concave and
(1) plano concave.
Each lens measures 1.5" (50mm) in diameter. Ground and polished faces and ground edges. Comes in a wooden storage box measuring 4.5" wide, 3.5" long and 2.5" tall.