The Nikon SC-29 is an off-camera flash cord that provides full TTL control for Nikon Speedlites when used with Nikon SLR cameras which have the TTL hot flash shoe. 3' long when coiled, it expands to 9', and permits easy use of flash when the camera is mounted upon a bracket.
The AF Illuminator mounts directly to the camera's hot shoe and provides AF assistance to the camera in low-light conditions. This cord fully supports all advanced flash functions when used with the SB-900, SB-800 and SB-600 with an applicable camera.
Some other improved features are: Posi-Lock (an improved locking switch) at both ends, and the cord on the camera shoe that now connects parallel to the camera.
In addition, the SC-29 Off-Camera AF TTL Cord and the SB-800/ SB-900 Quick Recycling Battery Pack can be used as an off camera master controller in a Multi-Flash Set-up