Photographer, author and teacher Syl Arena introduces Canon’s Speedlite line in this B&H video, including the 600EX-RT, which he discusses in depth. Arena points out its new technologies and how they have improved slave shooting and group-mode work. He goes into the detailed scenarios for using the 600EX-RT in various situations, and walks us through the functions and menus in an easy-to-understand manner.
Throughout the discussion, Arena offers anecdotes and professional tips that will help you develop proficiency and creativity with your Speedlites. Toward the end of his presentation, he shows us some examples of his work and discusses how he lit each image. This is a great video chock full of suggestions for learning to use Canon Speedlites.