Sigma A 28 mm f/1.4 DG HSM review - Distortion

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Sigma A 28 mm f/1.4 DG HSM

21 January 2019

Arkadiusz Olech

6. Distortion

The chart below presents results in the distortion category of different full frame 28 mm lenses, previously tested by us.

	Sigma A 1.4/28	Zeiss Otus 1.4/28	Nikkor AF-S 1.4/28	Nikkor AF-S 1.8/28	Voigtlander Skopar 2.8/28	Canon EF 1.8/28
APS-C/DX	−0.19%	−0.67%	−0.69%	−0.86%	−0.99%	−1.19%
FF	−0.86%	−1.39%	−1.12%	−1.13%	−1.54%	−1.85%

It’s clear the Sigma wins here hands down, being better not only than the older constructions like the Canon EF 1.8/28 but also prevailing over the new, optically complex instruments represented by the Otus and the Nikkor. As a result on the smaller APS-C/DX sensor you won’t notice distortion at all because a value of −0.19% is in accordance with zero within the margin of error. The aberration slightly increases to −0.86% on full frame but even such a result should be called slight. A round of applause for Sigma constructors.

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