Sigma 120-400mm F4.5-5.6 DG APO OS HSM Canon on Canon EOS 5D Mark III vs Canon EF 200-400mm f/4L IS USM Extender 1.4x ON on Canon EOS 5DS R

COMPARISON SELECTION (3 selected items max.)

DXOMARK Score

Best at f=120mm & f/4.5 [?]
17

Lens Metric Scores

Sharpness [?]
13 P-Mpix
Transmission [?]
5.8 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1.2 EV
Chr. aberration [?]
8 µm

DXOMARK Score

Best at f=420mm & f/5.6 [?]
21

Lens Metric Scores

Sharpness [?]
18 P-Mpix
Transmission [?]
6.9 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
4 µm