btw , if you all wan to know how i test. i use a Metz hammer head as the flash and use my 80DX on my cam.. connect with my syn cord to the 80DX and it din fire off. the other thing is that when i connect the syn cord to the DX .my Metz ready light went off .. ![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)