LensTip.com

Lens review

Sigma A 50 mm f/1.4 DG HSM

17 April 2014
Arkadiusz Olech

6. Distortion

Classic 50 mm devices don’t usually have any serious distortion problems; still it’s worth comparing the tested Sigma to its rivals to see how it fares. The appropriate data are gathered in a chart below.


Zeiss
Otus 1.4/55
Voigtlander
1.4/58
Sigma
A 1.4/50
Canon
EF 1.4/50
Nikkor AF-S
1.4/58G
APS-C/DX
−0.19%
−0.30%
−0.01%
−0.49%
−0.52%
FF
−0.69%
−1.01%
–0.12%
–1.98%
−1.41%


Two things are clear: firstly, the distortion level of the Sigma is practically zero within the margin for error so the constructors corrected it in a perfect way; secondly the Sigma result is the best of all 50 mm devices despite the fact that its task was a bit more difficult than that of the Zeiss and the Nikkor, as both of them feature a bit bigger focal lengths and are more expensive.


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Sigma A 50 mm f/1.4 DG HSM - Distortion
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Sigma A 50 mm f/1.4 DG HSM - Distortion