Take a look at http://www.orbisflash.com/, I've had one for a while and works well, when I was looking at them Rayflash wasn't as powerful/efficient with light from the flash and as smaller the lights a lot harder.
Anybody know if you could still use the flash to control other flashes? I can't imagine why you couldn't, although the reduction in light may further limit range.
Thank you for all that information!
2 questions:
i) how much of a pain is it that the Rayflash blocks the focus assist?
ii) Anyone able to pro/con the Rayflash versus the Opteka RL-600 E-TTL II Macro Twin Ring Lite Flash?