ERH India2 Pcs Plano Convex Lens Diameter-50 mm Focal Length-30 cm for Cameras and Photography, Projectors, School Science Project Work etc.

ERH India 2 Pcs Plano Convex Lens Diameter-50 mm Focal Length-30 cm for Cameras and Photography, Projectors, School Science Project Work etc.

EISCO Optical Glass Lenses (Set of 4) 50mm Double Convex & Concave, High Quality Polished Glass for Physics, Light Refraction, Ray Optics, Science Experiments, Learning & Educational Lab Equipment