Camera Nikon D850 get a hybrid viewfinder, and will allow you to make the rollers 8K
On the website of a major photography shop B&H appeared page Nikon camera D850. While there is very little information, but stated that the FX format camera (as Nikon calls full frame cameras) will allow you to capture videos with a resolution of 8K from the images obtained by interval shooting.
Another source drew attention to the recesses next to the viewfinder eyepiece. According to him, it’s not holes for screws, and proximity sensors. They allow you to automatically switch to the electronic viewfinder when necessary.
Allegedly, the viewfinder of a Nikon D850 will be a hybrid, combining the advantages of optical and electronic. Description of this design can be found among the patents obtained by the Japanese manufacturer.