Originally Posted by
alexniedra
I agree with you Keith - The ST-E2 is frequently put down due to the fact that it uses IR instead of radio frequencies to trigger wireless flashes. However, I have begun to use 2 580 EX II's in a master (sometimes off)-slave setup with great results. I'm not sure if there is a difference in the IR technology between the ST-E2 and the 580 EX II, but I was able to trigger my slave 580 EX II outdoors (at night) under city lights at 30 feet, and I am pretty sure I could have gone farther. I have yet to try the setup in broad daylight, but I still find the performance of the IR trigger system satisfactory for my needs, I'm sure Calulot will as well.
Just my $0.02.