You also might want to check out my write-up on here, "Interested in Strobism." It's a little bit dated now as new equipment has come out, but it's still a good starting point. And I must agree with the above--the YN560 is a great flash for the money. I just received one this weekend and I've been playing with it ever since. It's a great little flash for the money. However, it is not an ETTL flash--only manual.