SU800 vrs SB900
The flash has to fire to set of the IR pulse to trigger other flashes.
Therefore the downside is if you have a 'blinker' for a subject you run the risk of many shots with closed eyes :/
Upside is you can use the on board 900 for a bit of fill-in if you so wish
Light is Light, its what you do with it that counts
|Kinderdijk by PEB|
from Best Landscape With at Least One Wind Mill.
|Lights of Manhattan by cand1d|
from Your City - Night Skyline
|Mornin Dew by Abbasi46|
from Macro world
|Crash and Boom by qhenson|
from My Best Photo of the Week