This syrp 3c link cable is used to link up your camera to the syrp genie for making time lapse and real time videos this cable is compatible with the following cameras canon eos 7d 50d 40d 30d 6d 5d 20d 10d 5d mark iii 5d mark ii 1d x 1d c 1d mark iv 1dsmark iii and 1dsmark iin