Sigma C 65 mm f/2 DG DN review - Distortion

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Sigma C 65 mm f/2 DG DN

27 February 2021

Maciej Latałło

6. Distortion

I am completely aware that the C series devices would be a result of a compromise to some extend, and the producers might give up on distortion and vignetting correction. Still, to be honest, I hoped that, when it comes to the Sigma C 65 mm f/2 DG DN model, the producers would try to fight a bit. After all in many primes with a focal length ranging from about 60 mm to 85 mm distortion is the easiest aberration to correct.

Unfortunately I was let down. Traces of pincusion distortion can be noticed already on the smaller APS-C sensor and its official level reaches +0.92%. Of course you won't have any problems to notice distortion on full frame as our result amounted to as much as +2.51%.

The Voigtlander Apo-Lanthar 65 mm f/2 Aspherical 1:2 Macro, being, as a macro lens, more difficult to design, can reduce distortion to a level of +0.33% so, in our opinion, Sigma could have made more of an effort and reduce the level of that aberration at least two times.

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