Sigma 20mm F1.8 EX DG ASP RF Nikon on Nikon D800E vs Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR on Pentax K-3

COMPARISON SELECTION (3 selected items max.)
Sigma 20mm F1.8 EX DG ASP RF Nikon
Sigma 20mm F1.8 EX DG ASP RF Nikon

DXOMARK Score
Best at f=20mm & f/2.8 [?]
28

Lens Metric Scores

Sharpness [?]
23 P-Mpix
Transmission [?]
2.1 TStop
Distortion [?]
0.6 %
Vignetting [?]
-2.3 EV
Chr. aberration [?]
8 µm
Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR
Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR

DXOMARK Score
Best at f=30mm & f/3.5 [?]
17

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3.6 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1 EV
Chr. aberration [?]
7 µm