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How-to: Make an Upcycled Magnifying Glass Necklace • Crafting a Green World
Let's make a camera lens from a magnifying glass.
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Amazon.com : 8.3" x 11.75" LARGE 3X Fresnel Lens FULL PAGE Magnifier - Solar Oven/DIY Projection TV PLANS (1 pack PREMIUM GRADE Large Lens) : Health & Household
How do I build a telescope at home? | HowStuffWorks