United Scientific Supplies LCV520 Double Convex Lens, 50 mm Diameter, 500 mm Focal Length

United Scientific Supplies LCV520 Double Convex Lens, 50 mm Diameter, 500 mm Focal Length

United Scientific Supplies LCC506 Double Concave Lens, 50 mm Diameter, 150 mm Focal Length

United Scientific Supplies LCV312 Double Convex Lens, 38 mm Diameter, 300 mm Focal Length