I recently got a Canon F-1 (old model) at a reasonable price from the Evilbay ($87 body only). As expected it came with melted seals and mirror bumper but for the price I paid canít complain. I cleaned up the old seals and put in new ones. Camera is in good working order and I look forward to take it out for a spin. One thing bothers me though; I can see dust in the viewfinder right behind the eyelevel window. Anyone knows if the prism can be opened so I can access the eyelevel window from the inside and clean it up? Thank you