When I try to change the ISO on my 20D to 3200, all I get is an H. I set the camera on manual, set the custom function to On so that I could change the ISO, and tried to change it. When I rotate the dial, the read out goes from 1600 to H. Am I doing something wrong? I want to use the higher ISO for sports shots. I've had the 20D about 5 months. I upgraded from a Digital Rebel.



