Photo 1 of Fresnel Lens, Diameter 200mm (7.9''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Magnifiying. (Focal Length 100mm)

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Photo 1 of Fresnel Lens, Diameter 200mm (7.9''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Magnifiying. (Focal Length 100mm)