First Look at the Sigma 20mm f/2 DG DN Contemporary Wide fast compact metal lens

Sigma introduced today a new fast wide-angle compact prime mirrorless lens from its I series – the Sigma 20mm F/2 DG DN. This will be the 7’th and widest lens in the I series.

Expending the I series of lenses

Sigma has been expanding its unique I series of compact all-metal lenses since 2019 (officially since 2020, the original 45mm lens from 2019 was added after the fact).

Over the past 3 years, we tested several of these lenses including the 45mm DG DN, the 65mm F2 DG DN, and more recently the 90mm DG DN. All of these lenses received very high marks on our tests including good marks when compared to similar Sony and Voigtländer lenses.

The Sigma 20mm f/2 DG DN

The new Sigma 20mm f/2 DG DN looks almost identical to the rest of the I series of lenses. Made of metal with a grooved aperture and focus rings the lens is fairly light at only 370g/13.oz.

Sigma implemented both nano and multi-coating on the lens to reduce ghosting and reflections. The internal structure of the lens includes 13 elements in 11 groups with 5 special elements. The lens’s close-up distance is 22cm with somewhat unimpressive 1:6.9 magnification.

The lens uses a fast and silent stepping motor which Sigma claims should work perfectly with the latest generation of fact focusing/shooting cameras in both still and video.

The lens comes with a metal Petal-type lens hood and a magnetic metal cap (plus a regular plastic cap).

The new Sigma 20mm f2 DG DN Contemporary

Sigma 20mm f2 DG DN Contemporary

Sigma 20mm f/2 DG DN lens specs

The Sigma 20mm f/2 DG DN has the following specs:

  • Focal length and aperture: 20mm, f/2 Full-Frame coverage.
  • Optical design: 13 elements in 11groups including 1 FLD, 1 SLD element, and 3 aspherical elements.
  • Aperture blades: 9.
  • Minimum focus distance: 22 cm (1:6.7  macro magnification).
  • Filter thread: 62mm.
  • Sealing: dust and water sealing.
  • Mount: E, and L mounts.
  • Weight: 370g/13.oz.

Pricing and availability

The Sigma 20mm f/2 DG DN should be available starting late February 2022 for a price of $700.

hands-on videos and reviews from across the web

The lens already has a number of hands-on previews and a few early reviews – here are a few of them:

Christopher Frost with a review of the Sigma 20mm f/2 DG DN

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Gordon Laing with a comparison of the Sigma 20mm f/2 DG DN to the Sony FE 20mm f/1.8

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Dustin Abbott look at the Sigma 20mm f/2 DG DN

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Chris from DPR look at the new Sigma lens

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Iddo Genuth
Iddo Genuth is the founder and chief editor of He has been a technology reporter working for international publications since the late 1990's and covering photography since 2009. Iddo is also a co-founder of a production company specializing in commercial food and product visual content.

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