Quote Originally Posted by LiamG View Post
This is a pretty good rundown of the interface: http://www.camerasunderwater.co.uk/ttl-flash-interface

The TTL quench pin is the lower right hand pin if you are holding the camera with the back facing you, however, it won't function unless the camera detects a flash.
Thank you. I could make a test but I don't have the scope with me now. I am pretty sure that it's the camera fault. I got it free and the AF only works half way and now no ttl flash it's ok by me.