Yikes! This color run powder is nasty stuff on camera lenses. Imagine what it must do to your lungs!
If there hasn’t been a Color Run 5k or 10k race near you, there probably will be soon. And with all that color, you certainly want to take some pictures, right? Not with your camera you don’t.
I’m never one to worry much about lens dust, but the color bombs they throw out at Color Runs are different. In the last month my lens rental business has had over 20 lenses and several cameras nearly ruined by these things. For what it’s worth, all of the renters tell us they really weren’t near any of the major ‘color bombs.’
via Photographing a Color Run Will Destroy Your Camera Gear–Don’t Do It.