---
title: Sigma 20mm f/1.4 DG DN Art
description: "Ultimate astrophotography lens with unique 20mm f/1.4 specification. Breathtaking sharpness corner-to-corner at maximum aperture captures stars as precise pinpoints of light."
brand: Sigma
mount: L-Mount
focal_length: 20
aperture: 1.4
angle_of_view: 95
lens_type: Prime
weight: 635
year: 2022
weather_sealed: true
image_stabilization: false
price: 899
focus: Auto
lens_category: ["Ultra-Wide Angle"]
filter_size: 82
max_magn: 0.15
close_focus: 0.23
sku: N/A
diameter: 87
length: 111

date: 2025-07-23
draft: false
author: Jan Wedekind

featured_image: /lenses/sigma/sigma-20mm-f1-4.png

last_updates:
    - date: 2025-08-13
      note: added reviews

---

From Sigma: 

> AN ART LEVEL 20MM F1.4. THE ULTIMATE LENS FOR ASTROPHOTOGRAPHY.
> Outstanding optical quality and a range of invaluable features – The ultimate astrophotography lens from the 20mm F1.4 pioneer
> 
> The F1.4 series represents the Sigma Art line, which pursues the highest optical performance and rich expression. The full-frame Sigma 20mm F1.4 DG DN | Art is a mirrorless version of the Sigma 20mm F1.4 DG HSM | Art; the one and only lens* with its unique specification of maximum aperture of 1.4 and an ultra-wide angle of 20mm. This lens offers photographers overwhelming optical performance and unlimited potential for ultra wide-angle creativity at a compact physical size. The exceptional F1.4 brightness and the breathtaking sharpness across the entire image even at maximum aperture make this lens the ultimate choice for astrophotography. 
> 
> In nightly darkness and focused to infinity, the 20mm F1.4 DG DN | Art captures stars in the sky as clear, precise pinpoints of light. State-of-the-art optical design and the large, high-precision double-sided aspheric glass front element made it possible to add a front filter thread without any compromises regarding optical performance or size. The addition of other invaluable features such as a rear filter holder and a variety of useful switches further increases the creative possibilities and easy usability of the lens. 
> 
> Its incredible sharpness and very bright aperture, coupled with the compact body and thoughtful features, make the Sigma 20mm F1.4 DG DN | Art the ultimate lens for astrophotography and an ideal companion for any photographically demanding situation.

[Official Website](https://www.sigma-global.com/en/lenses/a022_20_14/)

Reviews:

* Cameralabs: [Sigma 20mm f1.4 DG DN Art review](https://www.cameralabs.com/sigma-20mm-f1-4-dg-dn-art-review/), Gordon Laing, Aug 2022
* Dustin Abbot: [Sigma 20mm F1.4 DN ART Review](https://dustinabbott.net/2022/08/sigma-20mm-f1-4-dn-art-review/), Aug 2022
* Lenstip.com: [Sigma A 20 mm f/1.4 DG DN](https://www.lenstip.com/637.1-Lens_review-Sigma_A_20_mm_f_1.4_DG_DN_Introduction.html), Maciej Latałło, Oct 2022

YouTube:

* Pav SZ: [Sigma 20mm DG DN f1.4 Art - BEAUTIFUL lens!](https://www.youtube.com/watch?v=a4pqVYgYle8), Aug 2022
* DPReview TV: [Sigma 20mm F1.4 DG DN Art Review](https://www.youtube.com/watch?v=dji5_Fywbn4), Aug 2022
* Christopher Frost: [Sigma 20mm f/1.4 DG DN 'Art' lens review (full-frame & APS-C)](https://www.youtube.com/watch?v=0qgOcFnAcVc), Aug 2022
* Tony & Chelsea Northrup: [Sigma 20mm f/1.4 DG DN Art vs Sony 20mm f/1.8G (lens review)](https://www.youtube.com/watch?v=B_tYfseRUOg), Aug 2022
* Kai W: [Sigma 20mm f/1.4 DG DN ART - Brilliantly Bokehliciously Wide!](https://www.youtube.com/watch?v=g6MfEVoHOTg), Feb 2023