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How to start campfires with mirrors and magnifying lenses. By Tim MacWelch Outdoor Life. Published May 5, 2017 8:45am EDT | Updated May 17, 2017 4:22pm EDT. Facebook ...
The magnifier uses a variety of components [Ad_w00000] had lying around. For the optical side of things, an old Canon DSLR zoom lens was pressed into service as the main magnifying element.
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