Previews up:
https://www.dpreview.com/reviews/nik...essions-review
http://www.imaging-resource.com/PROD...ikon-d850A.HTM
http://www.pocket-lint.com/review/14...ixels-of-magic
A Nikon designed sensor apparently and it has BSI.
https://www.youtube.com/watch?v=0tJqI3KyftE