I recently used my new D850 in a Nauticam housing at Misool Eco Resort Indonesia. I am very much in love with it. I used a Nikon D2x in a Nexus housing for many years and then the same housing was retrofitted to contain the D4 although many functions were not accessible because of the retrofit. This is my first Nauticam housing and I am very impressed with the ease of use and the vacuum system. I used the Nikon 8-15 and the Nikon 105mm. Fortunately my Nexus dome port with a 30mm extension and Nauticam to Nexus converter ring worked perfectly with the Nikon 8-15. 15mm was the only range that did not vignette on the shade but I didn't need any more than that. I should be set with this rig for many years. Of course it also required larger portable external hard drive space and bigger XQD cards. I went from 32G to 128G. You can actually take a pic at 15mm and turn a tiny fish into a nice looking fish portrait if you want. So far I have not used the camera much on land. I particularly like the availability of back button focus and the ability to easily switch between stills and video. I use Ike 161 strobes and have not had TTL since film days so I shoot all manual camera and strobes. Yes, I spent a lot of money but I hadn't upgraded in a long time. I considered going to a 4/3rds camera to have less heavy equipment to haul around the world and hand hold on topside wildlife shoots but I'm glad I stuck with a DSLR.
Judy Johnson Texas, USA