Have a question concerning digital cameras...what feature controls the 
clarity of a picture? By that I mean If I wanted to primarily take pictures 
of a sporting event (such as basketball) which feature/features would I 
focus on to pick the best camera for me. I'm not looking at spending over 
$400. If anyone has any reccomendations for a good camera for taking action 
photos, your input would be greatly appreciated.

Thanks in advance.