I have a Nikon D50 and I have recently noticed very slight black dots in the viewfinder. At first I thought this was dirt on the lens so I gave it a clean (carefully) and they were still there. At this point I tried cleaning the camera end of the lens, the reflex mirror and the actual eyepiece glass but to no avail. If I change the lens they are still there so its something to do with the actual camera. Any ideas? I dont think its effecting the photos just the viewfinder but its just a little bit annoying. Any ideas would be gratefully received.