Maxlam76: Some comments ->
- Focus is OK but the image quality due to the used high ISO sucks...- Sony A7 is used in combination with a Sony prime. Nikon is used with a Sigma lense. The comparison is certainly not fair- Previous implementation of CDAF from other camera makers are even more impressive in low light (Panasonic goes to -4eV).
@steelhead3 I think what Maxlam76 is alluding to isn't the optical quality, it's the focusing ability. My Sigma 35 1.4 Art on my D800 takes longer to lock on to focus (and does more focus hunting in low light) than does a native Nikon 35mm 1.4 lens.
Vadimka: Let's take a minute of silence now, to remember our fallen comrades mr Canon & mr Nikon.
Ummm... This sensor is more than likely to appear in a "D900"... It's poor Canon that's going to be left out in the cold.