I'll have to test out the difference between print and screen on the noise issue. I've never really dealt with it too much in the past, but now that I've done a few events, it starts to become a factor in crappy lighting.

The APDT Rally Obedience trial I did this weekend was really bad for light. Multiple color temps from four different sodium vapor lights and I was shooting up to ISO 6400 with my 85mm f1.4 wide open pretty much all the time.

Once I learned the patterns I managed to concentrate on a few brighter spots and got down to ISO 2200 and managed to move up to f2