>>2962961Best of the best, Sony A7sii
Best of the midrange, Sony A7s
Best of the budget, any second hand full frame non canon body
The A7s use sensors with much larger photosites (pixels), meaning far less noise at higher isos, the only factor to consider is that it "only" has 12 megapixels (obviously a trade off of the large photosites).
The A7sii has ibis, so a bit better for hand-held shots in low light if you're shooting stationary stuff.
No-one does better, it's sony's dedicated low light sensor that they refuse to sell to anyone else, the only other people that make sensors are canon and they're a decade behind when it comes to low light performance.
