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Nikon UK - Flash Cords
I have the SC28 with a SB600 which enables the TTL functions to work. Some of the lower spec cords will not keep TTL.
SC15 - Is for cameras with a PC connection on both camera and flash
SC17 - Connects between hotshoe on camera and flashgun (unsure about iTTL - now discontinued)
SC24 - For F5 film SLR
SC28 - Connects between hotshoe on camera and flashgun (iTTL will still work)
SC29 - Connects between hotshoe on camera and flashgun (iTTL will still work) & (AF assist on SB800 will work)