Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs home2022 and other sewing craft

and other sewing craft

of non ferrous metals (aluminum

nickel plated surface

Warm Company Steam-A-Seam 2 Double Stick Fusible Web-9"X12" Sheets 5/Pkg (5517) (2-Pack of 5)

even those with metal frames and glass lenses (up to 1

Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs home2022 and other sewing craftDouble Concave Lens, 50mm Focal Length, 2" (50mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs Optically True, Double Concave Lens50mm Diameter, 50mm Focal LengthHigh quality, optically true lens. Made of highly polished, quality glass. Spherical with ground edges. Designed for educational purpose and science classroom demonstrations in optics and light physics. Lens measures 2" (50mm)