Double Convex Lens, 300mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs sold2024 yueton 11 Yards 4MM Crystal

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please use the external power supply 5 v logic

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Double Convex Lens, 300mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs sold2024 yueton 11 Yards 4MM CrystalDouble Convex Lens, 300mm Focal Length, 3" (75mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs Product Features DOUBLE CONVEX Highly polished, double convex lens SPHERICAL Lens measures 3" (75mm) in diameter 300MM FOCAL LENGTH Converging lens with a 300mm focal length OPTICALLY WORKED GLASS Made of high quality, optically worked glass. Highly polished with ground edges GREAT FOR PHYSICS