6 inch or 8 inch Dome port?

[Scubanomad]

Which would you choose for the Canon EF 16-35 F2.8L the nauticam 6" or 8"? Does image quality differ hence aberration?

 

[decidedlyodd]

For rectilinear wide-angle you want the biggest dome you can get in order to have the corners in focus. You'll also probably need a diopter of some sort since the minimum focusing distance on that lens is 28cm/11in.

 

[Scubanomad]

Thanks, however at UW photography guide it was said that "using the 16-35mm without a diopter on a 8”, with good results." but perhaps thats only true for the 8" dome?
Canon 5D Mark III mini-review and impressions, with 5D Mark III underwater settings|Underwater Photography Guide

For rectilinear wide-angle you want the biggest dome you can get in order to have the corners in focus. You'll also probably need a diopter of some sort since the minimum focusing distance on that lens is 28cm/11in.

 

[vladimir]

Go to WetPixel.com and sign up. Then search the articles and forums using "dome theory" and "diopters" (and maybe even "dioptres", on the off chance a Brit has some valuable input ) as search terms. There is an amazing wealth of knowledge over there.

 

[Diver Dave1]

Watch this video by Alex Mustard "Domes without the Drone". find it via searching online or at wetpixel.