www.steeletraining.com/ Photographer Phil Steele explains how to set the Canon 580EX II Speedlite flash in Master Mode to control remote, off-camera flashes.

580EX II at Amazon.com:
www.amazon.com/gp/product/B000NP3DJW?ie=UTF8&tag=s…

Also see my video course on shooting headshots and portraits on a budget with small flashes at SteeleTraining.com.