Hi, I just received my SU-800 today. I have been looking through the manual and where in the heck is the section on how to set up the SB800 and 600??? All I'm seeing is how to set it up with the SB-R200 which I don't have. I'm wanting to set one 800 as main and the other 800 as fill then the 600 as a hairlight. I'm not sure what mode the 800 and 600 needs to be in. Right now I have the SB800 set as Remote just to trigger the 600. This looks harder then I thought it would be.:frown: Help!!!!
Debbie,
I will attempt to do this without my gear in front of me (beach weekend, left the gear at home :smile

. When I got my SU-800 last year, I was a bit confused too. Here's a plan. You will need the manuals for all of the equipment.
You have three speedlights. Set them all in remote and put them in separate groups. Set them to channel 1. Refer to each manual to do this. Note: Once in remote, they are always on. If they turn off, the batteries need changing.
A: SB800 (prime)
B: SB800 (fill)
C: SB600 (background or hair)
Once you set the speedlights in remote, channel 1, in their respective groups, you don't have to fiddle with the settings.
Now, set your studio up with your doll subject and put your camera on a tripod.
Group A (prime) - Camera left 45 degrees from subject
Group B (fill) - Camera right near tripod
Group C (BG/hair) - your choice. My first time I lit up the BG.
Set your camera to M mode, ss 1/125, f/8, ISO 200 (no Auto ISO), Auto WB. Commander mode should be turned off. I'm not sure about your bracketing question.
Turn your SU-800 on. Adjust the settings for channel 1. Set the groups to the following settings
Group A (prime) - TTL, 0.0 EV
Group B (fill) - TTL, -1.0 EV
Group C (BG/hair) - TTL, -2.5 EV
Place the SU-800 on the hotshoe, focus and fire. All three should have fired, right

Play with these settings. You will find that TTL "should" properly expose your subject everytime. You can then change Group C to Manual Mode 1/64 power (see below). As I learned, the prime provides the most light, the fill reduces shadows/add shape and the bg/hair provides separation or highlights.
Once you get the hang of TTL, set everything to manual, still Channel 1. Manual mode looks like an upside down W.
Group A (prime) - M 1/1 power
Group B (fill) - M 1/4 power
Group C (BG/hair) - M 1/64 power
To adjust the lighting here, you will need to either move the speedlight further away or closer as needed or change the manual power settings on the SU-800. This is where the L-358 light meter comes in handy.
The cool thing about the SU-800 in a studio environment is no wires, no visible pre-flash and the ability to change your speedlight settings from your camera.
I hope this helps. Good luck and let us know how it goes. :smile: