04-27-2014, 08:51 PM
Quote:Oh, about the Sun theory: I was thinking that was a possibility as well. I use a 500mm mirror (Tamron SP 500 f/8) a lot. Also -and I am taking the stupidity bullet here so that some lucky reader might not have the same happen to them- I did sort of point a 135mm Takumar straight at the sun a while back. Not that long. It was a bright sunny day here in California. I wanted the catch the sun coming over the edge of a tall building to produce flare. Yes, everyone wants flare controlled, and I'm out trying to create it. That's me. I feel pretty foolish if that is what did it. On the other hand, that was over two weeks ago, and I use my camera every day (of course!) On the third hand I have been noticing light control and contrast problems...It is a bit odd still. Indeed, it looks like as if the sun has been allowed to burn a hole by laying around without lens cap. However, the mirror assembly is in front of the shutter, directing most of the light upwards to the view finder, and a bit down to the AF sensor. Only mirror lock up could cause this?
Anyway, see if you can clean the smoke residue with a good wet sensor cleaning system. And let the shutter be replaced, i guess.