Canon RF Wide Angle Options - 14-35F4 vs 15-35F2.8

Does anyone have experience with the two new Canon RF wide angle zooms, the 15-35F2.8 and the 14-35F4?

Which of these would be better suited for underwater use? Either with a 230mm dome port or with the Nauticam WACP-2?

Is there any noticable difference between them underwater?

Question has been asked in this thread:

View archived post in: New RF 14-35 f4L, anyone tried?

probably worth following as someone posted they have plans to take the 14-35 UW soon.  I would expect the limiting factor to be corner sharpness due to dome port optics.  If you search Canon 15-35mm, you'll find some posts where people mention they have the 15-35, but no quality description apart from they are happy with it. Might be worth PM'ing them to see if they are willing to share an image with you?

17 hours ago, ChrisRoss said:

Question has been asked in this thread:

View archived post in: New RF 14-35 f4L, anyone tried?

probably worth following as someone posted they have plans to take the 14-35 UW soon.  I would expect the limiting factor to be corner sharpness due to dome port optics.  If you search Canon 15-35mm, you'll find some posts where people mention they have the 15-35, but no quality description apart from they are happy with it. Might be worth PM'ing them to see if they are willing to share an image with you?

 

Soon ColdDarkDiver will give us his feedback about this on quoted thread!