Sigma 17-50mm F2.8 EX DC HSM Pentax on Pentax K-3 vs Pentax smc PENTAX DA 16-45mm F4 ED AL on Pentax K-3 vs Pentax smc PENTAX DA Star 16-50mm F2.8 ED AL (IF) SDM on Pentax K-3

COMPARISON SELECTION (3 selected items max.)

DXOMARK Score

Best at f=50mm & f/2.8 [?]
21

Lens Metric Scores

Sharpness [?]
13 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1 EV
Chr. aberration [?]
9 µm

DXOMARK Score

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

Lens Metric Scores

Sharpness [?]
11 P-Mpix
Transmission [?]
4.2 TStop
Distortion [?]
0.3 %
Vignetting [?]
-0.7 EV
Chr. aberration [?]
16 µm

DXOMARK Score

Best at f=16mm & f/2.8 [?]
15

Lens Metric Scores

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