The new Sigma 20mm f2 DG DN C lens for mirrorless cameras is perfect for users looking for high-end performance and usability in a compact package. As well as a classic wide-angle focal length, which is a match for street photography, landscapes and more, this Sigma prime lens features a bright f2 maximum aperture for your low-light shooting and depth-of-field needs. As well as a high-quality optical design, which promises to deliver sublime quality at all apertures, this exceptional wide-angle lens from Sigma includes a rugged all-metal build and a physical aperture ring for a pleasant user experience.
Some good reviews about sharpness and image quality, but vignetting is present.
https://dustinabbott.net/2022/02/sigma-20mm-f2-dg-dn-iseries…
https://www.thephoblographer.com/2022/07/14/sigma-20mm-f2-dg…
Christopher Frost's review: https://www.youtube.com/watch?v=PsqPwNRkT3A
Great lenses in this series. Perfect walk around glass. I think that whatever optical imperfections they may have will possibly be considered a classic 'look' in a couple of decades.
I have the 17mm and the slower 24mm. These lenses remind me a lot of classic optics in terms of build/feel, sort of like a contemporary version of the still in production Pentax Limiteds. The Sigma 'iSeries' seems to have a similar design ethos - quite compact but with interesting and in many aspects excellent optics.
The quality belies the 'C' (Contemporary - Sigma's lower end line) designation. Sigma is really producing some great gear these days. Totally the opposite of my impression of the brand 20 or 30 years ago.