Sigma A 35 mm f/1.2 DG DN review - Distortion

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Sigma A 35 mm f/1.2 DG DN

11 September 2019

Arkadiusz Olech

6. Distortion

The following chart shows distortion results of different full frame, fast 35 mm lenses which we have tested so far. We included both the APS-C/DX sensor and full frame distortion values.

	Canon 1.4/35L II	Sigma A 1.2/35 DN	Nikkor AF-S 1.4/35	Sigma A 1.4/35	Zeiss 1.4/35	Samyang MF 1.4/35	Samyang AF 1.4/35
APS-C/DX	−0.19%	−1.11%	−0.96%	−0.59%	−0.74%	−0.83%	−1.04%
FF	−0.55%	−2.53%	−1.90%	–1.09%	−1.48%	−1.58%	−2.01%

In this category the Sigma A 35 mm f/1.2 DG DN has its first noticeable slip-up. Its distortion on the smaller sensor amounts to −1.11% and on full frame it even increases to −2.53%. Such high values we didn't see in tests of even old 35 mm constructions and compared to newer devices the Sigma really lags behind. It's enough to say that distortion of the tested lens on the APS-C sensor is higher than the distortion of the reflex camera Sigma A 35 mm f/1.4 DG HSM on full frame.

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It seems the Sigma's constructors gave up on the proper distortion correction even though the lens is physically big and features a really complex optical system – a pity.