The beautiful light painting photo you see here was created using steel wool (here’s a tutorial on the technique). Basically, you fix some steel wool on the end of a rope, set it on fire by rubbing a 9V battery against it, and then swing it around to fling sparks all over the place. While it’s becoming a pretty common photo project, it can also be hazardous to your lens’ — and your body’s — health. Jon Beard, the photographer behind this photo, learned the hard way. See that thick yellow line in the upper right hand corner? That’s one of the bits of burning metal striking his $2,000 Nikon 14-24mm f/2.8G lens.
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Mother Jones reports that the U.S. Environmental Protection Agency is cracking down on glymes — chemicals linked to health problems that can be found in many products we regularly come in contact with, including digital cameras:

Did you print a piece of paper today? Or use a digital camera? If so, it could have exposed you to glymes, a clear liquid class of chemicals used as solvents in printer ink, carpet cleaners and other household products. For a decade, the EPA has known about studies that link glymes to health problems including miscarriages, developmental damage, and gene mutation. And yet only now is the agency beginning to regulate them. This July, the EPA announced that it plans to clamp down on glymes, which may join the ranks of the 360 chemicals subject to the EPA’s “significant new use rule.” This means that any time a company wants to use glymes, it would have to ask the EPA first.

This Mystery Chemical Could Cause You To Miscarry [Mother Jones]

Image credit: point & shoot by quapan