hey guys. i need some help regarding wireless flash. ive seen many cool pics here using a wireless flash. now i know nothing on the subject but i have a 580 exII and want a wireless trigger if thats what its called. ive seen a canon one that mounts on the hot shoe but read that its infrared so i think that would be limiting if the flash and unit werent face to face or close to communicate. can someone please point me in the right direction into a good unit? id prefer to buy good and buy once. thanx




