1Pc Convex Lens Concave Lens Plane Convex Optical Lens For Student

EISCO 6Pc Optical Lens Set, 3" - 200Mm, 300Mm, 500mm Focal Lengths - 3 Double Convex & 3 Double Concave, 3" (75Mm) Diameter Lenses - Optically True

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Double Convex Lens, 200mm Focal Length, 3" (75Mm) D, Glass Lens, Ground Edges, Polished, For Physics Classrooms

Large Plano Convex Lens 150mm 200mm Magnifier Glass Lenses 6X 8X Magnifying

5 Double Convex Optically True Lens FL 5cm Diameter 50mm