I'm upgrading my underwater system from a Sony A7R IV to the new A7R VI and am considering making a fairly significant change to my wide-angle setup at the same time.

My current A7R IV system uses the Sony 16-35mm behind the Nauticam N100 180mm Optical Glass Wide Angle Port.

For the new system, I'm considering the Sony FE 28-60mm f/4-5.6 behind the Nauticam N100 Flat Port 45, with the M67 Bayonet Mount Converter II and WWL-1B wet wide-angle lens.

This seems like a very different optical approach from the 16-35/180mm dome combination I've been using, so I'd really like to hear from anyone who has experience with the 28-60 + WWL-1B on a full-frame Sony system.

In particular, how does the image quality compare with a good rectilinear wide-angle lens behind a dome, especially toward the corners? How useful is the 28-60mm zoom range with the WWL-1B, and how practical is removing and reinstalling the WWL-1B during a dive?

For anyone who has moved from a conventional wide-angle/dome setup to the WWL-1B, did you find it to be an upgrade, a tradeoff, or simply a different tool?

Thanks — I'd really appreciate hearing about firsthand experience before I finalize the new system.

The WWL-1B and most wet lenses in general use 28mm at the widest 130 degree FOV, end with the longest zooming being the Sony FE 28-70mm which zooms to 59 degrees. I reviewed WWL-1B in UWPMAG.com issue #120 and the original WWL-1 before the Sony FE 28-60mm existed in issue #114 if you care to lookup the benefits V. Sony FE 16-35mm lenses that are 107 to 63 degree and rectilinear.