As some of you may know, I recently purchased a used 1Ds Mk II in excellent condition but when I look through the view finder, I am seeing a piece of dust or dirt of some kind and cant seem to get it off with blowers or swabs so I'm guessing this dirt is possibly in between the focusing screen and the penta-prism?
How do you remove these things and reinstall them? I can't find anything in the owners manual that covers this?
Cheers!

