Olympus M.ZUIKO DIGITAL ED 12-40mm F2.8 PRO on Olympus OM-D E-M1 vs Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR 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.)
Olympus M.ZUIKO DIGITAL ED 12-40mm F2.8 PRO
Olympus M.ZUIKO DIGITAL ED 12-40mm F2.8 PRO

DXOMARK Score
Best at f=12mm & f/2.8 [?]
20

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3.3 TStop
Distortion [?]
1.3 %
Vignetting [?]
-0.9 EV
Chr. aberration [?]
10 µm
Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR
Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR

DXOMARK Score
Best at f=30mm & f/3.5 [?]
17

Lens Metric Scores

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