- 38, 50, and 70mm diameter glass lenses available
- Each set contains 3 Double Convex, 3 Double Concave in 20cm, 30cm, 50cm Focal Lengths
- Optically true glass
- Ground, beveled edges
Includes: (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.