Took this last week in Anilao, Bonito Island to be exact.
Camera & Exposure Specs: Canon EOS 5dmk3, Aquatica A5dmk3 Pro Housing, Tokina 10-17mm with Tamron SP1.4 Pro TC, Twin S&S YS-D1 Strobes on full. ISO 200, f16, 1/100. Lens zoomed to 12mm plus TC= 16.8mm, Aquaview 45 was crucial to the comfort of the shooter while taking this shot. Plus it helped with getting the housing down closer to the reef.
That would be the wrong thing to do. Set up the camera to single AF point then use the joystick to move the point around to where you want the focus to be. Activating all 61 points gives up that control and the camera could lock on to something that you don't want.
Just a shout out to divers/photographers in the Vancouver BC area. The Vancouver Aquarium is hosting Diver's Weekend on January 19th & 20th. Aquatica is one of the major sponsors of the event and will have a display during the event. Jean Bruneau (Viz'art), Aquatica's Senior Technical Advisor will be on hand to answer any questions you may have. Expect the 5dmk3, D800, 7D, NEX-5n housings to be on display.