Irix 30 mm f/1.4
6. Distortion
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On the smaller APS-C/DX sensor you can notice some barrel distortion which value we determined as −0.83%. That result is a bit higher on full frame, reaching −1.51%; still, taking into account the angle of view of the tested Irix, there are no reasons to complain.
However, in this category the Irix performs a bit weaker than its rivals. The Otus 1.4/28 had distortion of −1.39%, and the distortion level of the Sigma A 1.4/28 was just −0.86%. You should also emphasize the fact that the task was more difficult for both these lenses as they feature a bit wider angle of view than the Irix.
| Canon 60D, 30 mm | |||
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| Canon 5D MkIII, 30 mm | |||
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