[dink]

Hi all,
I lent my Canon 40d to a friend and when i got it back I am seeing marks through the viewfinder. Does not affect the photographs.
I got a couple of lenses, so i swap one out one after another, i still see the marks in the same location. I've replaced the focusing screen before, so i took out the screen with the tool the kit came with... and i still see the marks... so now im suspecting it is the prism in the camera. Does anyone know how much it will cost to get this fix? and where can i bring my camera to get it repaired?

TIA