Sigma A 50 mm f/1.4 DG HSM
6. Distortion
| |
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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| Canon 50D, 50 mm | |||
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| Canon 5D MkIII, 50 mm | |||
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