The nikon gp1 ca10a cable is a 10 pin connecting cable for the gp 1 and nikon d4 d800 d3x d3s d3 d700 d300s d300 d2x d2xs d2hs or d200 camera the gp1 ca10a differs from the cp1 ca10 in that the cable is more flexible and durable and the locking nut has been increased in size with a white alignment mark in order to make connection easier the cable direction and length has also been slightly changed for ergonomic reasons