The pentax hotshoe adaptor fg flash is designed for off camera flash use with pentax dslrs pz and zx cameras it mounts to the hot shoe of the camera and allows the cameras built in flash to be used as a fill flash requires the use of either the 37347 f5p or 37349 f5pl extension cords and the 31022 off camera shoe adapter f which is equipped with a 14 20 threaded tripod bush some pentax flashes such as the af 540 fgz do not need the off camera shoe adapter f because they dir