I have a canon 40D which had a few specks of dust when looking through the viewfinder but not appearing on photos, stupidly i know i have tried to wipe the mirror and more spots and marks have appeared. I don't think the mirror is scratched but can someone tell me if the mirror on this camera can be cleaned to remove the marks (by Canon in the UK perhaps?) or alternatively any idea how much it would cost to replace the mirror in the UK?
Many thanks