I want to move my SB-900 off the D800, to get it above the lens and not create shadow.
I know that I can trigger the SB-900 using the wireless (Commander/Remote) mode, using the built-in flash to control the SB-900, without the built-in flashing as well (just the pre-flash to communicate the SB-900). But, I am under the impression that I get more control of the SB-900 when I use one of the cords, SC-28 or SC-29.
What's the deal, i.e. what do I loose by using the 100% wireless solution vs. using one of the cords? And what would I get using the SU-800, is that "just" to talk wirelessly to several groups, or is there a feedback mechanism?