(as of Oct 18,2018 08:33:01 UTC – Details)
(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.
50mm diameter glass lenses
3 Double Convex, 3 Double Concave – 20cm, 30cm, 50cm Focal Lengths
Optically true glass
Ground, beveled edges