2-Pack Large Fresnel Lenses 300mm11.81" Focal Length 600mm Acrylic Magnifier for Solar HeatingSolar CookingVisual Education. Focal Length 600mm

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.Diameter 300mm11.81" with different options on focal length. Thickness: 2mm Material: PMMAacrylic. Great for Visual Aid education Solar heating experiment Solar Cooking outside DIY Solar concentrator Scientific Research Magnifying. High light transmittance High efficiency in focusing High precision.