1DX should be better than 5DIII

"由於還沒有佳能1Dx的數據，不知其高感表現如何。高感表現排序，5DIII，D4，D700，5DII，D800。 "

1Dx's pixel is something like 20% larger than that on 5D3, so at the pixel level, it should be 20% better than 5D3 (that is, 1Dx ISO 12000 should be similar to 5D3 ISO 10000).  Or equipvelently, a fair comparison would be to compare 1Dx ISO 12000 to 5D3 ISO 10000.

Similarly, to fairly compare D4 and 5D3, D4 ISO 6400's photos should be compared to 5D3 ISO 4700's photos, but Imaging Resource does not take photos at the intermediate ISOs.