The DX format is still preferred by the majority of UW photographers. Much has been written about the D7000 as being among the 'best' DSLRs for underwater use in part due to the DX sensor's greater depth of field at a given aperture and an increase of the apparent focal length 1.5 times. A 60mm macro lens acts like a 90mm lens on a DX camera, giving you better subject magnification with the bonus of better depth of field. FX on the other hand allows for much greater ability to pull detail out of shadows and highlights, its like having every shot having built-in HDR adjustment capability. So there's obvious tradeoffs between sensor sizes.
No matter how fancy the camera body is there's always the issues of UW technique- avoiding backscatter, getting a good focus point and so on. The D800 gives amazing detail above water, provided one uses good shooting technique and has good glass. So we'll see how well I can do with this body underwater.
Here's some shots from Saltwater State Park taken last night, the first on the new camera body. All were done with the Nikon 60mm micro lens set to f22.
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/D800-images/i-6GHRHmW/0/M/DSC0167-M.jpg)
Frosted Nudibranch
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/D800-images/i-DRZLRL5/0/M/DSC0139-M.jpg)
Scalyhead Sculpin
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/D800-images/i-vSVkR5d/0/M/DSC0111-M.jpg)
Lion's Mane Jelly
![Image](http://www.hershmanphoto.com/Underwater-Photography/Marine-Life-of-the-Pacific/D800-images/i-BQDdRC6/0/M/DSC0136-M.jpg)
Copper Rockfish
Dan