Sigma A 105 mm f/1.4 DG HSM
6. Distortion
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If you use a smaller APS-C/DX sensor, distortion will be practically zero. Officially we got a result of +0.21% but, taking into account the margin of measuring error amounting here to 0.1-0.2%, it is zero within 2-simga limits.
On the full frame the result is a bit higher, amounting to +0.33%. Still that value remains very low, allowing to assess the tested Sigma very positively in this category. Especially that the Nikkor 1.4/105E reached +1.22% so noticeably higher.
| Canon 50D, 105 mm | |||
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| Canon 5D MkIII, 105 mm | |||
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