That was the major question going through my head during this entire review process. It’s a specialized camera that serves its target audience really well. The Sony A7s Mk II doesn’t have the resolution of the Sony A7 Mk II or the Sony A7r Mk II, but what it has is the ability to deliver usable images at nuclear high ISO results that end up throwing the laws of exposure right out the window. This is due to the 12.2MP full frame 35mm sized sensor at the heart of the camera. Further, this camera can see better than the human eye in the dark.
With the Sony A7s Mk II, the company decided to add an uncompressed RAW shooting ability new ergonomics to match that of all the other Mk II cameras, new features for video shooters, and improvements to the autofocus that makes it able to autofocus in situations where other cameras simply scratch their heads.
Sure, the Mk II won’t be for everyone: but will it be for you? Do you really need to shoot at ISO levels not even thought of years ago?