Sigma 17-50mm F2.8 EX DC OS HSM Canon on Canon EOS Rebel T2i, EOS 550D or Kiss X4 vs Tamron SP 24-70mm F2.8 Di VC USD Canon on Canon EOS Rebel T2i, EOS 550D or Kiss X4 vs Sigma 18-35mm F1.8 DC HSM A Canon on Canon EOS Rebel T2i, EOS 550D or Kiss X4

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 [?]
16

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3 TStop
Distortion [?]
0.3 %
Vignetting [?]
-0.7 EV
Chr. aberration [?]
11 µm
Tamron SP 24-70mm F2.8 Di VC USD Canon
Tamron SP 24-70mm F2.8 Di VC USD Canon

DXOMARK Score
Best at f=70mm & f/2.8 [?]
19

Lens Metric Scores

Sharpness [?]
10 P-Mpix
Transmission [?]
2.8 TStop
Distortion [?]
0.2 %
Vignetting [?]
-0.2 EV
Chr. aberration [?]
3 µm
Sigma 18-35mm F1.8 DC HSM A Canon
Sigma 18-35mm F1.8 DC HSM A Canon

DXOMARK Score
Best at f=18mm & f/1.8 [?]
26

Lens Metric Scores

Sharpness [?]
14 P-Mpix
Transmission [?]
1.8 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1 EV
Chr. aberration [?]
7 µm