This comparison of DXO's results is what makes me EXTREMELY SUSPICIOUS of them. The Nikkor 500mm scores 25, when every single trait that factors into that score is worse than the Canon 500mm...which also scores 25. That is just plain wrong. The Canon has zero distortion, higher sharpness, less vignetting, less CA, and the same transmission...on a LOWER RESOLUTION BODY! It should have a higher score than the Nikon.
I have been critical of DxOMark's Scores, but this takes the cake for the BS factor. Even the Sony 500/4 bests the Nikon on every measurement, but the Nikon lens outscores the Sony.
Quote from: DxOMark
However, while the Canon 500mm mounted on 5D Mark III is sharper optically than the Nikon model mounted on D800, at the light levels used for DxOMark score (1/60, 150 Lux), the excellent dynamic range of the Nikon D800 sensor helps it improve the DxO Mark Score and accounts for the level-pegging.
Sorry, but what the heck does sensor-based DR have to do with scoring a lens?!? Nothing. This
At least this time, they have apparently come right out and said that the "DxOMark Score" is utterly meaningless.