Okay, so ruling out the built in flash on the Hasselblad H4D-40, what are alternative TTL flash options both on camera and off camera? Also, is my Nikon SB900 with some sort of adapter an option? Is Quantum an Option? If no TTL option then what is the best non-TTL solution, other than studios strobes? It needs to be a very portable solution. Wireless would be preferable except in the on camera option.
Thanks for any help.