24 Jul Double Concave Lens, 200mm Focal Length, 2″ (50mm) Diameter – Eisco Labs
200MM FOCAL LENGTH || Diverging lens with a 200mm focal length. DOUBLE CONCAVE || Highly polished, double concave lens. Made of highly polished, quality glass. Spherical with ground edges. Designed for educational purpose and science classroom demonstrations in optics and light physics....