Tamron SP 17-50mm F/2.8 Di II XR VC LD Aspherical IF Nikon on Nikon D90 vs Sigma 17-70mm F2.8-4 DC MACRO OS HSM C Nikon on Nikon D90 vs Nikon AF-S DX Zoom-Nikkor 18-70mm f/3.5-4.5G IF-ED on Nikon D90

COMPARISON SELECTION (3 selected items max.)

DXOMARK Score

Best at f=17mm & f/2.8 [?]
14

Lens Metric Scores

Sharpness [?]
7 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
5 µm

DXOMARK Score

Best at f=24mm & f/3.2 [?]
14

Lens Metric Scores

Sharpness [?]
7 P-Mpix
Transmission [?]
3.9 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1 EV
Chr. aberration [?]
9 µm

DXOMARK Score

Best at f=24mm & f/3.8 [?]
12

Lens Metric Scores

Sharpness [?]
6 P-Mpix
Transmission [?]
4.6 TStop
Distortion [?]
0.3 %
Vignetting [?]
-0.8 EV
Chr. aberration [?]
7 µm