Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] Nikon on Nikon D90 vs Sigma 18-35mm F1.8 DC HSM A Nikon on Nikon D90 vs Sigma 17-50mm F2.8 EX DC OS HSM Nikon on Nikon D90

COMPARISON SELECTION (3 selected items max.)
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] Nikon
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] Nikon

DXOMARK Score
Best at f=24mm & f/5.6 [?]
14

Lens Metric Scores

Sharpness [?]
8 P-Mpix
Transmission [?]
3 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1 EV
Chr. aberration [?]
5 µm
Sigma 18-35mm F1.8 DC HSM A Nikon
Sigma 18-35mm F1.8 DC HSM A Nikon

DXOMARK Score
Best at f=18mm & f/1.8 [?]
22

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
1.8 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.3 EV
Chr. aberration [?]
8 µm
Sigma 17-50mm F2.8 EX DC OS HSM Nikon
Sigma 17-50mm F2.8 EX DC OS HSM Nikon

DXOMARK Score
Best at f=50mm & f/2.8 [?]
15

Lens Metric Scores

Sharpness [?]
8 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1.2 EV
Chr. aberration [?]
10 µm