Double Convex Lens, Unmounted with Ground Edges, 75mm x 17.5 cm FL (#L210)
Superior quality glass lenses are useful for teaching a variety of optical principles. Double convex lenses have two outwardly curved surfaces and a positive focal length. 75 mm diameter lens with a 21 cm positive focal length. Ground edges ease handling and ensure clear optics. Made of polished glass. Available individually or in packs of 5.
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