THis housing looks promising [similar to Gates] but the Sony’s F series do not have TTL. I use the Amphibico Surveyor II housing and I had to buy their newly developed “Light Sensing Device” which simulates TTL pretty well. BUT it is an extra expense AND an extra piece of sensitive equipment I must “lug” and maintain. But I use [2] Ikelite DS50s with mine and it works like a top! The big drawback to their housing for me is you do not have access to all functions of the camera, since most controls are electrical and not manual. BUt I am anxious to see your finished product!