Hello there while this is not a trip report I am fortunate to be going to Moorea to try swimming with the humpback whales in October. I am currently shooting with a Sony A7iii in Isotta housing and use a sigma 15mm or Tamron 17-28mm behind a 6 inch acrylic dome. I know the dome is small for the Tamron.
While I love my fisheye I have heard it can be nice to have some “reach” and most times you won’t be right on top of the whales. I’m debating whether I buy a larger dome for my Tamron or go with the 28-60 in a H63 flat port both which I have….and go with a wet optic like the AOI UWL-09PRO or WWL…
Of course the wet optic option is not tested by Isotta so don’t know if it will work well…
Any thoughts are appreciated