With their new RT lighting system.
I just picked up 2 600s and the st transmitter this week. I finally got a chance to pop them out today.
They are wonderful.
I can't tell you how sweet it was to show up, turn on the flash and controller, watch them sync instantly, and shoot.
You know it's good when the model says "you don't mess with your lights like the other guys."
I shot until we burned out the batteries in the st, which came out to 480 pics. The flash was still going strong with a power pack attached.
This is awesome.
PS. 580s and RPs for sale.


