Crayfish 3 Posted September 15, 2018 Hi just after some advise I have just got a Nikon 16-35mm f4 which I will be using on a full frame D800 behind a Nauticam 230 glass dome port. On the port chart they recommend a 90mm port extension but I am just wondering if I can get away with just a 70mm? I have a 70mm and a 20mm so could put those Together to make a 90mm but Just seeing if any one uses a 70mm and if they are happy with the results. Cheers Alex Share this post Link to post Share on other sites
TimG 62 Posted September 16, 2018 Hey Alex Not Nauticam (sorry) but I was using the 16-35 with a 230 domeport on my Subal D800 system. I found the 90 extension and a +2 diopter essential for the lens. It’s a tricky lens to house and get sharp corners. Unless someone can report a positive experience with a 70mm extension, I’d stick with the 90 if the photo opportunity is a one-off and you do not have the time or chance to reshoot. Share this post Link to post Share on other sites
Crayfish 3 Posted September 17, 2018 Ok cheers for that Ill try both and see if I can see any difference Share this post Link to post Share on other sites
