Sigma 17-50mm F2.8 EX DC OS HSM Canon on Canon EOS 70D vs Canon EF-S 17-55mm f/2.8 IS USM on Canon EOS 7D

COMPARISON SELECTION (3 selected items max.)
Sigma 17-50mm F2.8 EX DC OS HSM Canon
Sigma 17-50mm F2.8 EX DC OS HSM Canon

DXOMARK Score
Best at f=21mm & f/2.8 [?]
17

Lens Metric Scores

Sharpness [?]
10 P-Mpix
Transmission [?]
3.3 TStop
Distortion [?]
0.3 %
Vignetting [?]
-0.7 EV
Chr. aberration [?]
11 µm
Canon EF-S 17-55mm f/2.8 IS USM
Canon EF-S 17-55mm f/2.8 IS USM

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

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3.4 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
6 µm