If you've missed it, here are parts one, two, and three of our adventures with a 4'x3' fresnel lens, along with a gallery of all the picturesOur lens arrived with a corner chipped off, so the lens company sent us a second one for free (which also had its corner chipped off on arrival, but we didn't get a third for free). I've been holding off ( Read more... )

If you missed it, here's part 1 and part 2 of our adventures with a 4'x3' fresnel lens. As always, I've got a gallery of all the raw pictures, and this is a summary of the good ones.

The same SAFETY NOTES as before apply, with the addition that you shouldn't eat any food you cooked in the same skillet in which you just cooked non-edible things ( ( Read more... )

In case you missed it, here's part 1 of our adventures with the 3'x4' fresnel lens. Oh, man. I have lots more pictures. The same SAFETY NOTE as last time applies again, but with a few more additions. You should probably wash your hands after you're done handling stuff in the lens. In particular, when you heat copper up until it turns black, you've ( Read more... )

A couple weeks ago, Dustin got a whole bunch of people to each contribute a few dollars, and we bought a four foot by three foot fresnel lens. It arrived earlier this week, and we've been spending our lunch hours out in the sun playing with it.
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