Hi all, Today, I tried to take a couple pictures of my dog, and I noticed that there was a black thread/fiber on my view finder, so I checked my lens for that piece of fiber as a first instinct type check. Nope, wasn't on the front of the lens. Ok. So I took the lens off to see if it was on the rear element. Nope, not there either. Looked on the mirror, and although it was slightly dusty, it wasn't there either. I thought then, that it was on the focusing screen, and no, it's not there either. After looking at the camera at all sorts of different angles, I came to the conclusion that the contaminate was actually behind the view finder glass. So here I am, asking advice on how to take the camera apart, at least to the point where I can get to the view finder, so I could use some compressed air and give it a good blast to get all the crap out of it. Thanks!