Sigma 17-50mm F2.8 EX DC HSM Pentax on Pentax K-5 IIs vs Pentax smc PENTAX DA 16-45mm F4 ED AL on Pentax K-5 IIs vs Pentax smc PENTAX DA Star 16-50mm F2.8 ED AL (IF) SDM on Pentax K-5 II

COMPARISON SELECTION (3 selected items max.)
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/4 [?]
20

Lens Metric Scores

Sharpness [?]
12 P-Mpix
Transmission [?]
3.2 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
9 µm
Pentax smc PENTAX DA 16-45mm F4 ED AL
Pentax smc PENTAX DA 16-45mm F4 ED AL

DXOMARK Score
Best at f=28mm & f/4 [?]
18

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
4.2 TStop
Distortion [?]
0.3 %
Vignetting [?]
-0.8 EV
Chr. aberration [?]
16 µm
Pentax smc PENTAX DA Star 16-50mm F2.8 ED AL (IF) SDM
Pentax smc PENTAX DA Star 16-50mm F2.8 ED AL (IF) SDM

DXOMARK Score
Best at f=35mm & f/5.6 [?]
15

Lens Metric Scores

Sharpness [?]
10 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.4 %
Vignetting [?]
-0.9 EV
Chr. aberration [?]
18 µm