Canon EOS 5D Mark lll MDX underwater housing : Sea and Sea intros the MDX underwater housing for the Canon EOS 5D Mark lll digital SLR camera with full-frame C-MOS sensor. The Canon EOS 5D Mark III MDX underwater housing is compatible with both the VF180 1.2x and VF45 1.2x viewfinders. By attaching the VF180 or the VF45 prism viewfinders to the MDX underwater housing, the magnification increases by 1.2x and entire field of view can be seen at the same time. The unique design makes the MDX EOS 5D Mark lll one of the most ergonomically designed housing on the market. With both hands on the grips, further improved ergonomic design provides access to such controls as the main command dial and the sub-command dial for manual photography.