Canon EF-S 15-85mm f/3.5-5.6 IS USM on Canon EOS 70D vs Sigma 17-50mm F2.8 EX DC HSM Pentax on Pentax K-3

COMPARISON SELECTION (3 selected items max.)
Canon EF-S 15-85mm f/3.5-5.6 IS USM
Canon EF-S 15-85mm f/3.5-5.6 IS USM

DXOMARK Score
Best at f=15mm & f/3.5 [?]
13

Lens Metric Scores

Sharpness [?]
10 P-Mpix
Transmission [?]
5.1 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
8 µm
Sigma 17-50mm F2.8 EX DC HSM Pentax
Sigma 17-50mm F2.8 EX DC HSM Pentax

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

Lens Metric Scores

Sharpness [?]
13 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1 EV
Chr. aberration [?]
9 µm