I am currently at a double-header basketball tournament where my sister is playing. I am posting this from the iPhone app to see if I can get some quick help. What kind of aperture/ss/iso combos should I be using. My Len is the Nikkor 55-300 f/5.6 there is no natural light and I'm trying manual mode with 1/500 f/5.6 400 ISO and the shots are very dark. The body is a d3100 if it helps. Thanks in advance.