Sigma 50-500mm F4.5-6.3 APO DG OS HSM Nikon on Nikon D800E vs Pentax smc FA 50mm F1.4 on Pentax K-3

COMPARISON SELECTION (3 selected items max.)
Sigma 50-500mm F4.5-6.3 APO DG OS HSM Nikon
Sigma 50-500mm F4.5-6.3 APO DG OS HSM Nikon

DXOMARK Score
Best at f=50mm & f/4.5 [?]
21

Lens Metric Scores

Sharpness [?]
17 P-Mpix
Transmission [?]
6.6 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.2 EV
Chr. aberration [?]
10 µm
Pentax smc FA 50mm F1.4
Pentax smc FA 50mm F1.4

DXOMARK Score
Best at f=50mm & f/2.8 [?]
21

Lens Metric Scores

Sharpness [?]
11 P-Mpix
Transmission [?]
1.7 TStop
Distortion [?]
0.2 %
Vignetting [?]
-0.8 EV
Chr. aberration [?]
16 µm