Mike, the first thing i would do is take the camera out of Auto ISO. It's good to learn the dynamics rather than letting the camera adjust it. Like Sam, I set my own ISO most of the time, and just leave it at 100 unless I need to increase it. When I shot soccer last year, I did use Auto ISO, but I wanted to try it out and it was still daylight shooting at f/11, so I knew it wasn't going to do anything outrageous. That's something people tend to completely overlook. It's expressed as a ratio, which is why a lens with a maximum aperture of f/4 says 1:4 on it. Essentially, 1:4 is the same thing as 1/4. A lens with a maximum aperture of f/1.4 will say 1:1.4.