EISCO Optical Glass Lens, 3″ (75mm) – 200mm Focal Length – Ground, Beveled Edges – Use as Top Spinning Base

Features

• DOUBLE CONCAVE || Highly polished, double concave lens
• SPHERICAL || Lens measures 3″ (75mm) in diameter and approximately 12mm thick
• 200MM FOCAL LENGTH || Diverging lens with a 200mm focal length
• OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with beveled, ground edges
• GREAT FOR PHYSICS CLASSROOMS or TOP SPINNING || This optically true lens is excellent for physics classroom demonstrations in optics and light refraction. It’s smooth, concave surface also makes this lens ideal for top spinning