Stoked to have this in my bag. The new Nikon D850 will find its way into my workflow. I played around with a few files, and I'm quite comfortable with the way it's performing, so I have no issues with using it on a real gig along with my D5's for now.
Ok, so it's files and resolution are great. What else? The weight. I love my D5, and in extremely low light, I'll need to compare it to my D850. That said, I can't honestly say what the D850 can and can't do for ME, because I haven't used it yet on a real gig. I would imagine that during the reception, it'll get used quite a bit. I LOVE my WR-R10 WR-A10 radio flash system, and I've already tested it on the D850 and SB-5000 speedlight, and it worked flawlessly. The fact that I don't have to shoot in full resolution the entire wedding is fantastic. For dancing photos, I can't imagine needing anything more than small raw files. So, the weight, the adjustable file size, the focus system equivalent to the D5, and radio flash capabilities might make it the perfect wedding camera for me.
Ergonomically, I love it. It feels incredibly solid, and it doesn't feel out of balance with a longer lens on it, either. One of the most overlooked features with this camera is the extended frame coverage with it's focus points. This is great for a photographer like myself that loves to shoot wide open.... specifically with the Nikkor 105mm F1.4 E ED. This has been something we've requested, and Nikon listened. For fine art, shooting square is also something we requested, and Nikon obliged here, too.
My fellow ambassadors, @jerryghionis , @joemcnallyphoto , and @iamdixiedixon, have put this camera through it's paces. I trust their opinions, and they're raving about it. I'll give my impressions soon. I have 4 weddings in the next 9 days, so it'll be used, that's for sure. #nikonambassador #nikonusa #nikonphotography