WILL SOME OF YOU PEOPLE UNDERSTAND ?. We are not talking about sensor dust with the 5D we all get dust on our sensors. We are talking about dust and dirt inside the focusing screen that cant be cleaned out. This dust and dirt is inside the 5D straight out off the box. I should no i have had 3 all with the same problem. I sent every one back within days of getting them, never again would i have a 5D.