i think nauticam knows what they are doing..
if you look at the port chart... they clearly indicate the blue words and a * the 'Recommended Nauticam underwater optics based on best underwater optical performance' with the WACP2 set up. The other "blue words" set ups probably will also give you good optics but you have to remove the shade , which they shared.
the black * recommended "Recommended Port System" is the 230mm port option. i think that means it will work best if you don't want to go the WACP path. its good.. but not as good as the WACP
as no one has a WACP to show that there is no vig or any blurry at the edge. neither has a 40mm to show that 230mm will also not have that blurry edge.
i look at all the info so far... tell me nauticam is right... 🙂 till proven not so ...
show me that a 14mm sony with 30mm/40mm with 230 dome is not as good as a 16-35mm with 230mm dome. this two being the "recommended port system' not the best optics.. but recommended... i would think will be the similar... sharp in the middle.. blurry at the edge... but.. the 14mm is wider...so.... 🙂