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Double Concave Lens, 250mm Focal Length, 2" (50Mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great For Physics Clas

Double Concave Lens, 50mm Focal Length, 2" (50Mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great For Physics Class

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Concave & Convex Lens Optical Glass Objective Lens For DIY Achromatic Telescope

Concave & Convex Lens Optical Glass Objective Lens For DIY Achromatic Telescope

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Optical Glass Objective Lens Concave&Convex Lens For DIY Astronomical Telescope

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Concave Convex Lens Set Optical Glass Lens For Physics Teaching 2 Pack

Double Concave Lens, 100mm Focal Length, 2" (50Mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great For Physics Clas

HUGE OPTICAL CONVEX CONCAVE LENS 8.25" DIAMETER GLASS THICK PRO OPTICS &M3-A-02

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43mm Focal Length 330mm Cemented Doublet Glued Convex Lens ED Achromatic Biconvex Objective Lens For

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Double Concave Lens, 150mm Focal Length, 2"" (50Mm) Diameter - Eisco Labs

Eisco 6Pc Acrylic Lens Set - 1.5" (38Mm) Diameter - Double Convex, Double Concave, Plano Convex, Converging Concave-Convex, Diverging Concave-Convex,

Double Concave Lens, 500mm Focal Length, 3" (75Mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great For Physics Clas