I always thought it was my camera's ISO setting on above 400 at work. However, I took this on a tripod at 3 second exposure, f 2.5, and ISO at 100. What could it possibly be? I also used a tamoron 17-50mm f2.5 lens. Im talking about the fuzz on the ear cups of the headphones, background etc. http://i.imgur.com/mc0My.jpg (Big Picture)!