Will let you know in a couple of months- had a similar thought process - currently shooting a d800 and was thinking of going to a d500 for the focus speed/ frame rate and big animal flexibility of the 10-17 over the ff 16-35 but decided that the WACP was the way to go as
A) cheaper that a new camera and housing.
B) good Zoom range- not quite as wide as a fisheye but rectilinear so hopefully less bulbous headed wales.
C) next trip is Norway in jan so the possibility of getting sensible sharpness near wide open is tempting.
Havent had a chance to dive it yet but the rig is about the same weight as a 16-35 with the old subal 11 inch mega dome but more compact- still not exactly small though.......
Will update with thoughts and pics when I get back.
- Don Silcock likes this