Forget your other solar fire starters: Use a Fresnel Lens : r/Survival
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20 Pieces Fresnel Lens Credit Card Pocket Plastic Magnifier Emergency Solar Fire Starter Ruler Compact Survival Bushcraft Classroom Outdoor Hobbies : Amazon.co.uk: Stationery & Office Supplies
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Pocket fresnel lens
Fresnel Lens Pocket Credit Card Magnifier - 853 - YouTube
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Survival Magnifying Glass | Flat Fresnel Lens
Credit Card Size 1.5X Fresnel Sheet Magnifier
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Fresnel lens | Britannica
Fresnel Lens Credit-card Sized Firestarter 4-pack | 5col Survival Supply
