Perfect for doing optical experiments comparing focal lengths and convex vs. concave lenses.
- 38mm dia. glass lenses
- 3 double convex, 3 double concave - 20cm, 30cm, 50cm focal lengths
- Optically true glass
- Ground, beveled edges
Optical Glass Lens Set, 6 Lenses - 3 Double Convex, 3 Double Concave - 38mm Diameter - 20, 30, 50cm Focal Lengths. (3) Double Concave -20,30,50cm Focal Length, (3) Double Convex - 20,30,50cm Focal Length. This lens set is perfect for doing optical experiments comparing focal lengths and convex vs. concave lenses.