LensTip.com

Lens review

Sigma C 24 mm f/3.5 DG DN

19 May 2021
Maciej Latałło

5. Chromatic and spherical aberration

Chromatic aberration

With such an aperture fastness and angle of view we didn't expect any problems connected to longitudinal chromatic aberration, especially that the optical construction of the tested lens features low dispersion glass. Photos, presented below, show clearly that indeed in this category the lens fares very well. You can notice very faint traces of colouring only at the maximum relative aperture but they disappear already on slight stopping down.

Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration


A graph, shown below, presents the lateral chromatic aberration performance, depending on the detector and aperture values.

Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration


You won't see any serious issues in this category; only near the maximum relative aperture, and on the edge of the APS-C the values approach a borderline between low and medium levels. Overall the results are better than those of the rival Samyang and Sony devices. Only the Tamron managed to outperform the Sigma here as its aberration never exceeded 0.06%.


Please Support Us

The coronavirus crisis has been adversely affecting many businesses and, sad but true, ours is not an exception. Despite that difficult situation we would like to preserve continuity and high quality of publications available on all our websites. Still, we are now aware it might be impossible without additional financial help. That's why we would like to ask all those who visit, read, and care about Optyczne.pl, LensTip.com i Allbinos.com for support - it's enough you send us a small sum of money via PayPal. If a lot people decide to support our websites we think we'll stand a chance and survive next months without any lasting harm. We count on your support and understanding, stay safe and be healthy.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

A7R III, RAW, FF, f/3.5 A7R III, RAW, FF, f/16.0
Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration

Spherical aberration

First photos of this chapter don't feature any noticeable 'focus shift' effect. When it comes to circles of light reached before and behind the focus, they don't look identical but the differences between them are hardly pronounced, concerning mainly concentric circles inside. Overall you can say that the Sigma C 3.5/24 doesn't have any important problems when it comes to correction of spherical aberration.

A7R III, f/3.5, before A7R III, f/3.5, after
Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration Sigma C 24 mm f/3.5 DG DN - Chromatic and spherical aberration