Could you explain the result of sharpness for Sigma 85mm F1.4 EX DG HSM Nikon? When I have compared it to Nikon AF-S Nikkor 85mm f/1.4G, Nikon AF Nikkor 85mm f/1.4D IF and Samyang 85mm f/1.4 Aspherique IF, Sigma was given the lowest score of 12.
But after I have reviewed all measurements for sharpness that you published I can't find such large differences.
Sigma 85mm F1.4 EX DG HSM even got the same sharpness result as Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] Nikon. I own both and the difference is immediately noticeable in favor of Sigma.
d7100 d600 d3x
Nikon AF-S Nikkor 85mm f/1.4G 16 20 19
Nikon AF Nikkor 85mm f/1.4D IF 14 16 15
Samyang 85mm f/1.4 Aspherique IF Nikon 14 17 15
Sigma 85mm F1.4 EX DG HSM Nikon 12? 18 16
I assume that there was a typo and that the result is 15...