I'm trying my hand at flash photography at the moment and I'm looking to expand my flash gear range, I started looking at slave units such as the ST-E2 and ST-E3-RT. I have access to 2 x 580EX II units (one is mine, the other, from a friend) and a 5D m3.
Perhaps I'm having a blond moment here, but what's the (notable) difference between the two ST units?
Perhaps I'm having a blond moment here, but what's the (notable) difference between the two ST units?