2-Pack Fresnel Lenses Φ110mm(4.33") Focal Length 60mm Acrylic Fresnel Magnifier for Solar Heating,Equipment Lens,Lighting Concentrator,Visual Education (Focal Length 60mm)

الوصف

Size:Focal length 60mm 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.