When we were in college, we wanted to build something we dubbed the anti-peephole lens. See, you’d position it on top of the peephole outside your pal’s door, enabling you to see inside. Just imagine the practical jokes!
We have no idea if the anti-peephole is possible, but if you know, please email us!
In the meantime, here’s a peephole-related project that gives you a wide-angle lens for your digital camera.
Wide-angle lenses are really fun, but they can cost hundreds (assuming you can even get one for your camera.) This project is super simple and only sets you back $11!
[via reader Tracy Cristal]