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Six Seasons 5-Pack Fresnel Lens Φ40mm(1.57") Focal Length 40mm Acrylic Fresnel Lenses for Classroom Visual Education, Equipment Lens, Solar Project (Focal Length 40mm)
Product ID: 369244930
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Description
Fresnel lenses are most used in solar concentration, solar heating and light gathering applications. Or cooking outside as a fire starter. Fresnel lenses can also be used as projection lenses or magnifiers. They are great for magnifying print in books, magazines, maps, telephone numbers, recipes, etc. They are great as a gift or toy to childrens who need visual aid.
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