2-Pack Large Fresnel Lenses Φ300mm(11.81) Focal Length 120mm Acrylic Magnifier for Solar Heating,Solar Cooking,Visual Education. (Focal Length 120mm)

2-Pack Fresnel Lens Diameter 300mm(11.81) Thickness: 2mm, Material: PMMA(acrylic) Great for Visual Aid education, Solar heating experiment, Solar

8.3 x 11.75 LARGE 3X Fresnel Lens FULL PAGE Magnifier -- Solar Oven/DIY Projection TV PLANS (1 pack PREMIUM GRADE Large Lens)

Magnificientlarge Pmma Fresnel Lens 300mm - Optical Solar Concentrator Magnifying Glass

300mm Large Optical Pmma Plastic Solar Fresnel Lens Focal Length Big Solar Concentrator Magnifying Glass Lenses Make Fire Tools - Lenses - AliExpress

1pcs large fresnel lens Size:Φ500mm, Focal length:500mm, Thickness:3mm, Material:PMMA(acrylic) Visual Aid for education - Great for Solar

1-Pack Large Fresnel Lens Diameter 500mm Focal Length 500mm Plastic (Acrylic) Lens for solar collecting,magnifying,solar heating,solar projector fire

2PCS/Pack square acrylic fresnel lens Size:250*250mm, Focal length:200mm, Thickness:2mm, Material:PMMA Visual Aid for education - Great for reading

2-Pack Fresnel Lenses 250 * 250MM Focal Length 200MM Acrylic Fresnel Lens Fire Starter/Solar Oven/Scientific Research&Education/DIY Projection TV

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) : Industrial & Scientific

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.

2-Pack Large Fresnel Lenses Φ300mm(11.81) Focal Length 600mm Acrylic Magnifier for Solar Heating,Solar Cooking,Visual Education. (Focal Length 600mm)

2-Pack Fresnel Lenses 280 * 280MM Focal Length 600MM Acrylic Optical fresnel lens Fire Starter/Solar Oven/Scientific Research&Education/DIY Projection TV PLANS By Six Seasons: : Industrial & Scientific

2-Pack Fresnel Lens Φ250mm(9.84) Focal Length 90/100/120/140/185/230/240/260/290/1000mm Acrylic Fresnel Magnifier for Solar Heating Concentrator,fire Starter,Visual Education (Focal Length 140mm) : Industrial & Scientific