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I have been following user reports of this camera on DPreview.com.
Phillip Bloom has a nice video that highlights how good this camera is. It turns night into day shots in video.
Basically what I get is that ISO25600 is useable. Perhaps ISO51200.
Above that it starts to look a bit noisy.
Its not just the noise that is superior its the ability to maintain dynamic range at higher ISOs as well as colour saturation.
What does this mean for nightscapes?
In my opinion not a lot. 6D, 5D3, D800, Sony A7r A7 all can do up to ISO6400 quite well. That's plenty on a nightscape at 30 seconds F2.8 up to 20mm.
Add in a Polarie and the high ISO is of no use as now you can expose up to 10 minutes perhaps even 15 minutes with a wide lens.
Where it would be handy is no Polarie and lenses 50mm and up which star trail very quickly untracked.
The A7s might also enable video of the night sky through a telescope which could be nice.
I am somewhat interested in this camera but don't see what it could take my A7r couldn't already do or my Fuji XT1.
Greg.
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