Sigma C 35 mm f/2 DG DN review - Coma, astigmatism and bokeh

Have you rated your lenses yet?

Sigma C 35 mm f/2 DG DN

8 January 2021

Maciej Latałło

7. Coma, astigmatism and bokeh

Coma remains completely invisible in the area limited by the size of the APS-C sensor but when you get to corners of full frame you can notice slight deformations – point-like diode images get some 'wings' which are, in fact, not a symptom of classic coma but of higher degree aberrations. The Sigma manages in this category noticeably better than the Sony FE 1.8/35 and as well as the more expensive Batis.

Center, f/2.0	Corner APS-C, f/2.0	Corner FF, f/2.0

Center, f/2.8	Corner APS-C, f/2.8	Corner FF, f/2.8

Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values amounted to 10.5% and it is a medium value. Even though its direct rivals fared better in this category we don't have any serious reasons to complain.

Please Support Us

If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free.

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

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

Defocused circles of light look sensibly well but nothing more than that. Three aspherical elements inside the lens make themselves felt here - you can notice distinct onion ring bokeh. As a kind of solace you should mention the fact that mechanical vignetting disappears almost completely on stopping down the lens to a value of f/2.8.

Center, f/2.0	Corner APS-C, f/2.0	Corner FF, f/2.0

Center, f/2.8	Corner APS-C, f/2.8	Corner FF, f/2.8

Center, f/4.0	Corner APS-C, f/4.0	Corner FF, f/4.0