Sigma 17-35mm F2.8-4 EX DG Aspherical HSM Canon on Canon EOS 5DS R vs Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical [IF] Pentax on Pentax K-3

COMPARISON SELECTION (3 selected items max.)
Sigma 17-35mm F2.8-4 EX DG Aspherical HSM Canon
Sigma 17-35mm F2.8-4 EX DG Aspherical HSM Canon

DXOMARK Score
Best at f=17mm & f/2.8 [?]
24

Lens Metric Scores

Sharpness [?]
11 P-Mpix
Transmission [?]
4 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.6 EV
Chr. aberration [?]
9 µm
Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical [IF] Pentax
Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical [IF] Pentax

DXOMARK Score
Best at f=35mm & f/2.8 [?]
15

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3.2 TStop
Distortion [?]
0.1 %
Vignetting [?]
-0.4 EV
Chr. aberration [?]
6 µm