Firing studio lights with a sync cord gives you a lot of flexibility. It allows you to move around more, get better angles on your subject and if you have a long sync cord, it can give you the distance from your subject necessary to get that natural, non-posed look. You typically use sync cords to fire studio lights through a power pack, but they can be used on an external flash as well. Instructions 1 The -inch end of the sync cord is the...