#1. "RE: Can I use the SB-800/D2x to trigger the R1 package?" In response to Reply # 0
The SB-800 can trigger the R1 units but even at the lowest power setting the SB-800 will add light to the exposure. You could try covering the flash head with an ND filter at the lowest power setting to reduce the contribution light which should work. The SU-800 is filtered so only infrared light is used to trigger the R1 flash units.