Top Spinning Base, 5″ (125mm) Surface, 12mm Thick, Double Concave, Optical Glass Lens, 20mm Focal Length, D, Ground, Beveled Edges

Description

Description

Top Spinning Base, 5″ (125mm) Surface, 12mm Thick, Double Concave, Optical Glass Lens, 20mm Focal Length, D, Ground, Beveled Edges. This is a high quality, optically true lens. Designed for educational purposes, but is also ideal for top spinning.

• Optical Concave Optical Glass Lens
• Double concave – 350mm Focal Length
• High quality, optical lens
• Huge 125mm diameter. Thickness at edge is approximately 12mm. Note, thickness varies as they are not designed to be consistent in that respect.
• Ideal for top spinning.