Thanks for the link. This part of the article evoked a memory ... - - If your camera is new but has dust problems, some may - - come from the camera itself. As you use it, particles - - can slough off of different components inside the mirror - - chamber. Over time, this particle shedding will wane, ... Some time ago (or long time ago depends on your POV and/or natal day) ... computers had tape drives instead of disk drives. We had the odd (almost perverse) problem that perfectly new reels of tape might be more prone to errors than tapes that had been used a few times. The condition was called "floating wear particles" -- and was caused by tiny flakes of the magnetic material released during the manufacturing process as the tapes were cut into the 0.5 inch width. BTW, those tapes were 2400 feet long by 0.5 inch wide -- that's almost 1/2 mile long. They were made by bonding the magnetic recording material to large Mylar tapes (about 2 feet wide, IIRC) and then slitting that into the 1/2 inch wide tapes. MGD