SEOH Lens Glass Double Concave 38mm x 50mm Focal Length

Eisco Labs 6 Piece Premium Optical Glass Lens Set, 50mm Diameter - 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL)

SEOH Lens Glass Double Convex 50mm x 100mm Focal Length

American Educational 6 Piece Glass Lens Set

Ajax Scientific Polished Glass Double Lenses Spherical (Bi-Concave), 38mm Diameter, 50mm Focal Length

Pelican 1170 Case With Foam (Black)

Eisco Labs Double Concave Glass Lens 75mm diameter, 50 cm Focal Length - 1 Single Lens

SEOH Lens Glass Double Convex 38mm x 10cm Focal Length

SEOH Lens Glass Double Convex 38mm x 5cm Focal Length

Eisco Labs Double Convex Glass Lens, 75mm diameter, 200mm Focal Length

SEOH Lens Glass Double Concave 50mm x 5cm Focal Length