Added: 4 years ago
From: drsimons
Views: 35,305
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  • It's a Fresnel-Lens-Melting penny?! Marvelous!

  • Not like the heats gonna travel all the way up the tongs.. why is this so hard to believe?

  • SOLAR SOLDERING IRON!

  • Is it strange to anyone else that someone is using a bare hand and metal tongs to hold a supposedly 500 degree penny?

  • @Ozymandyus yes it is!!! i thought that too!!

  • @Ozymandyus 500C? more like 1000. and no, its not that bad. it takes a long time for the other end to get hot when it's that long and thin.

  • where you got from so big lens?

  • You can snag them from old rear-projection TV's, it's the screen.

  • what is groove pitch of this lens?

    i bought 0.7m² fresnel lens from ebay, but it has too small groove pitch, so diameter of spot is big because of difraction.

  • illegal

  • faggot

  • hot

  • cool

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