Dpreview team a in-depth comparison of all the three camera, the entire video if of 14min length so if ur in hurry. Just read the short conclusion first.
If you have less time read this
Best Image Quality – Sony A7R III
Best Overall Camera – Sony A7R III
Panasonic S1 /S1R – Best For Studiographers and Landscape Shooters AF is not good as Sony A7R III or Nikon Z7
If you are a Nikon Users with F Lenses, go with Nikon Z7. A excellent option with perfect balance of still and videography.
And how come it’s not better than the other cameras, or at least as good? Not trying? How come it’s not better than an Red 8k monstro in image quality?
Come on try? Don’t let Black magic cameras dance over you!
Some revolution!
If BM introduced such a camera, how much better it would be, and in shooting movie grade video.