So today I went out and bought myself a brand spankin' new Canon 75-300mm lens for my Rebel xTi. Just out of curiosity, anyone have this lens and have any tips or things to look out for when using this? I haven't had the chance to upload any work I've shot with it so far, but there's been a few nice ones so far --ALSO-- I'm looking into purchasing a few lens hoods, but am not really sure what exactly to be looking for. Any tips, suggestions, etc? Anything helps!