I am a enthusiast who just purchased a 1d Mark lln and a 85 1.8 lens. I was using a 40D with a 70-200 lens. Last night I shot basketball in a low light gym. I shot on the AV mode with the f1/8. When I crank up the ISO to 1600 or higher the noise is terrible. Do I need to change modes to P or TV, or just deal with this gym situation??

