The Nikon D850 looks to be an excellent upgrade over its predecessor, the D810. The resolution has jumped from 36. 3MP to 45. 7MP, the burst rate has jumped from 5 to 7 fps (9 fps with the right accessories), and the entire AF system has been yanked directly from the flagship D5.
Not to mention the D850’s full sensor width 4K video, a first for a Nikon DSLR.
That's just a little bit of what the D850 has up its sleeve. Watch the video to find out more.. dpreview.com