Originally Posted by Peter Ericsson
I have read that some experience more grain with the 50D then the 40D due to so many more pixels. Not sure if this is true or not.
If you compare correctly - i.e., compare finished images - not true. 50D wins comfortably. If you do silly things like compare 100% crops, you may well get this result, but it's meaningless. You need to compare two things by reproducing them the same way, at the same size. If you do this, the 50D is well in front.