Frank Skomial , Jul 06, 2006; 12:38 a.m.
I used the Sunpak 555 connected to the PC socket of the SB-800. Both flashes on the camera. SB-800 in iTTL mode (Yes), and 555 in Manual mode mostly full power, but only contributing to ambient light directed to walls or ceiling. The SB-800 was never overpowered by the 555 this way in a church or larger reception/dance halls, and preserved the correct amount of flash on the subject determined during pre-flashes by the SB-800. Walls and background objects were much brighter than if the SB-800 was used alone. The SB-800 on camera produces single trigger signal to the PC socket on the SB-800 side, and does not produce any eletric signals associated with the iTTL pre-flashes. SB-800 cannot avaluate or even know about the power provided by 555, so in small rooms you may need to dial down the power of the 555 flash to prevent over exposure.
(I am not sure how SB-600 works or if it even has the PC socket ? - you can tell that).
With D70, I also use Sunpak 555 alone, setting D70 shutter to 1/1000, 1/2000, 1/4000, single blast full frame synchronization, for whatever shallow depth of field I want to obtain in bright sunny day with 85/1.4 or 50/1.4 lens, or to change day into night with the 1/8000 sync speed.
I need to say that I already had the Sunpack 555 and found creative way to use it with wire connection to SB-800.
If you do not have Sunpak 555, do not purchase Sunpak 555 for D200, since you will not be able to sync it any faster than it was possible with D70. Also Sunpak 555 is not compatible with the Nikon iTTL/CLS system.