Set the aperture to F2.8 and then kick up the ISO until you get the desired shutter speed. You want to get at least 1/500 of a sec shutter speed. If you can't get the necessary shutter speed then you'll need to look into getting an 85mm F1.8, which most of the people that I know that shoot volleyball or basketball use because of the darkness of a high school gym.
I would also set you're AF to center-point only and AI-servo. When you push halfway down on the shutter and hold on the subject, the focus will follow that subject as long as it stays in the focus area.
I am shooting with a Canon 20D. My lense options are a Canon 2.8 IM 70-200 or a Sigma 2.8 EX-DG 24-70.
I could really use some help with specific settings in trying to capture the best possible photos while shooting indoor volleyball.
Typically the shots are all in high school gyms (very poorly lit)
Any input would be greatly appreciated.I am not a professional photographer, just a dad trying to get some great shots to share.