Sigma 17-50mm F2.8 EX DC HSM Pentax on Pentax K-3 vs Pentax smc DA 50mm f1.8 on Pentax K-3 vs Pentax HD DA 21mm F3.2 AL Limited on Pentax K-3

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/2.8 [?]
21

Lens Metric Scores

Sharpness [?]
13 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1 EV
Chr. aberration [?]
9 µm
Pentax smc DA 50mm f1.8
Pentax smc DA 50mm f1.8

DXOMARK Score
Best at f=50mm & f/2.8 [?]
25

Lens Metric Scores

Sharpness [?]
12 P-Mpix
Transmission [?]
2 TStop
Distortion [?]
0.1 %
Vignetting [?]
-0.8 EV
Chr. aberration [?]
2 µm
Pentax HD DA 21mm F3.2 AL Limited
Pentax HD DA 21mm F3.2 AL Limited

DXOMARK Score
Best at f=21mm & f/3.2 [?]
18

Lens Metric Scores

Sharpness [?]
11 P-Mpix
Transmission [?]
3.5 TStop
Distortion [?]
0.6 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
13 µm