We expect the Z7 image quality to be similar but slightly better than that of the D850.
Here are some of the relevant details about the Z6 and Z7:
- Both do 4K at 30/25/24P and 144Mbps (H.264)
- 10 bit / N-Log / 422 is only on HDMI out (boo!)
- Focus peaking, zebras
- Questionable battery life (we need some good tests on this)
- $3400 for the Z7 and $2000 for the Z6
Some video samples: