Nikon D4S Score surfaced over the DxO Mark lab, as we have said earlier in our D4s vs D4 comparison review that Nikon D4s have same sensor as Nikon D4, the more ISO range is unlocked due to introduction of advance image processor with upgraded image processing algorithm
According to DxO Mark Lab scores, Nikon D4S beats Canon 1DX, as you can see in the table the low light king title remains to Nikon DF camera, Sony A7R is best machine for shooting subjects under controlled light situation.
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scores via DxOMarklab.com