Ok so I have a canon 40D and use my 50 mm 1.4 most of the time. Even when I do ISO 100 in a well lit area, I still get a lot of grain when I zoom in in PS or LR. This has always bugged me and I don't blow prints up large because of it. Forget it with high ISOs! Even nicely exposed, tack sharp pics have lots of grain. Anyone else have lots of grain with 40d or other "older" cameras? (I think I bought it in 2007.). Any tips to help with the graininess?