--- title: "Sigma 20mm f/1.4 DG HSM Art" description: "Discontinued 20mm f/1.4 ultra-wide Art prime, Sigma's DSLR design remounted for L-Mount: 1,035 g, 95 degree angle of view, 0.276 m close focus, $899. Reviewers praise image quality and the fast aperture; weight, no weather sealing and no filter thread draw criticism." brand: "Sigma" mount: L-Mount focal_length: 20 aperture: 1.4 angle_of_view: 95 lens_type: "Prime" lens_category: ["Ultra-Wide Angle"] weight: 1035 year: 2015 weather_sealed: false image_stabilization: false price: 899 focus: "Auto" filter_size: "None" max_magn: 0.14 close_focus: 0.276 diameter: 90.7 length: 154 date: 2026-10-25 draft: false author: "Jan Wedekind" featured_image: /lenses/sigma/sigma-20mm-f1-4-dg-hsm.png --- Key Take-Aways: The Sigma 20mm f/1.4 DG HSM Art is a discontinued ultra-wide prime that Sigma calls the world's first 20mm F1.4 lens, built around a 59 mm double aspherical element. Sigma's page lists the L-Mount version at 1,035 g and 90.7 mm across, with a 95 degree angle of view (Sigma gives 94.5), a length of 154 mm (Sigma gives 153.75), a 0.276 m minimum focus distance, 15 elements in 11 groups and no filter size given, and Sigma's US store prices the L-Mount selection at $899. Sigma makes no sealing claim. As of Oct 2026, six written reviews and thirteen videos are linked. Amateur Photographer's Amy Davies called it first-class image quality with only minor negatives, naming the lack of weather sealing and that no filter adapter was available at the time of testing. Digital Camera World's Matthew Richards praised the fast f/1.4 aperture, the ultra-wide view and the value, and marked it down for the 950 g weight, the integral fixed hood and the missing filter thread. Digital Photography School's Rick Berk found it sharp with minimal distortion and quick, accurate autofocus on a wedding dance floor in low light. In his video description Matthew Eddy calls it sharp with low barrel distortion and good for low light and Milky Way photography, while Jesus Martinez's description says it packs a great aperture but lacks many things, and That Tog Spot reports intermittent focus issues that he suspects come from the Sony body rather than the lens. [DISCONTINUED](https://www.sigma-global.com/en/discontinued/?mount=l-mount) From Sigma: > World’s first 20mm F1.4 lens —thanks to advanced large-diameter aspherical lens manufacturing technologies > > To offer an ultra-wide-angle 20mm focal length and F1.4 brightness at wide-open aperture, this lens incorporates a large double aspherical lens 59mm in diameter. Lenses of this type had been considered extremely difficult to manufacture, but Sigma took on the challenge to realize an F1.4 ultra-wide-angle lens that fulfills the strict performance requirements of the Sigma Art line. What made this breakthrough possible were Sigma’s advanced manufacturing technologies, which the company has developed over time by producing a wide range of ultra-wide-angle and large-aperture lenses. For example, milestone lenses such as Sigma 12-24mm F4.5-5.6 EX DG ASPHERICAL HSM, Sigma 8-16mm F4.5-5.6 DC HSM, and Sigma 18-35mm F1.8 DC HSM | Art were completely original products that helped Sigma develop outstanding design and production know-how and its current high-precision, high-efficiency production system. In turn, these advances made possible the new Sigma 20mm F1.4 DG HSM | Art. Moreover, Sigma’s advanced optical design minimizes distortion, transverse chromatic aberration, sagittal coma flare, and the reduction of brightness toward the edges of the image. Delivering top performance even at wide-open aperture, this lens can be considered the culmination of Sigma’s Art line. [Official Website](https://www.sigma-global.com/en/lenses/a015_20_14/) Sigma has discontinued this lens. It is the predecessor of sigma-20mm-f1-4 (the Sigma 20mm f/1.4 DG DN Art): the DG HSM is a DSLR design that Sigma also offered in L-Mount, which is why it is large and heavy. Specifications are the L-Mount figures from Sigma's page (the English page gives the angle of view as 94.5 degrees, entered as 95, and the length as 153.75 mm, entered as 154); the page shows no filter size, and the lens has no front filter thread, so the filter size is entered as None. The price is the L-Mount selection on Sigma's US store (Sigma America). Reviews: * Amateur Photographer: [Sigma 20mm f/1.4 DG HSM | A Review](https://amateurphotographer.com/review/sigma-20mm-f1-4-dg-hsm-a-review/), Amy Davies, Nov 2015 * Cameralabs: [Sigma 20mm f1.4 Art review](https://www.cameralabs.com/sigma-20mm-f1-4-dg-hsm-art-review/), Thomas, Dec 2015 * Dustin Abbott: [Sigma 20mm f/1.4 DG HSM ART Lens Review](https://dustinabbott.net/2016/04/sigma-20mm-f1-4-dg-hsm-art-lens-review/), Apr 2016 * Digital Photography School: [Lens Review: Sigma 20mm F1.4 DG HSM Art Lens](https://digital-photography-school.com/lens-review-sigma-20mm-f1-4-dg-hsm-art/), Rick Berk, Aug 2016 * That Photography Spot: [Sigma 20mm 1.4 ART Review - Is it worth it?](https://thattogspot.com/sigma-20mm-1-4-art-review---is-it-worth-it/), Jan 2021 * Digital Camera World: [Sigma 20mm f/1.4 DG HSM Art review](https://www.digitalcameraworld.com/reviews/sigma-20mm-f14-dg-hsm-art-review), Matthew Richards, Sep 2022 YouTube: * Christopher Frost: [Sigma 20mm f/1.4 'Art' lens review with samples (Full-frame and APS-C)](https://www.youtube.com/watch?v=e_IHxXf9uTg), Dec 2015 * Paul's Photography Channel: [Sigma 20mm f/1.4 ART Review - Part 1/2 (Overview)](https://www.youtube.com/watch?v=yVwBt3eL0Ic), Jan 2016 * DragonRiderNetwork: [Sigma 20mm f1.4 ART Lens Review](https://www.youtube.com/watch?v=PRnpV8uTYv8), Mar 2016 * Dustin Abbott: [Sigma 20mm DG HSM ART Review | Pushing the Limits](https://www.youtube.com/watch?v=baeWBualWZo), Apr 2016 * Tony & Chelsea Northrup: [Sigma 20mm f/1.4 Art Review](https://www.youtube.com/watch?v=aeNFGn3OBbQ), Jul 2016 * Matthew Eddy: [Review - Sigma 20mm f1.4 Lens](https://www.youtube.com/watch?v=zqM8jOq1H0s), Jun 2018 * Manny Ortiz: [Sigma 20mm 1.4 Review & Field test](https://www.youtube.com/watch?v=a9QrRG3EsLs), Nov 2018 * Jesus Martinez: [Sigma 20mm 1.4 Art Lens + Sony a6400 Review with Photos and FREE Preset](https://www.youtube.com/watch?v=oGDDZcuIMCQ), Feb 2020 * Pav SZ: [Sigma 20mm f1.4 Art (Sony-E) - Is it heavier than a BRICK?](https://www.youtube.com/watch?v=x6270bK4Qw4), Mar 2020 * Astro Road: [Astro Photography: Sigma 20mm f/1.4 DG HSM Art Vs Sony FE 20mm f/1.8 G](https://www.youtube.com/watch?v=xJkK3I7rC7Y), Aug 2020 * That Tog Spot: [Sigma ART 20mm 1.4 Review for Portrait Photography - Is this wide angle lens worth it?!](https://www.youtube.com/watch?v=BQfUX7yWOBU), Jan 2021 * KrisLuckPhoto: [Sigma 20mm 1.4 Honest Review | GOOD FOR ASTROPHOTOGRAPHY?](https://www.youtube.com/watch?v=In2JjPhEiAc), Jan 2022 * Tom Calton: [NEW Sigma 20mm f/1.4 DG DN vs OLD Sigma 20mm f/1.4 DG HSM (Photo & Video Review)](https://www.youtube.com/watch?v=2zc1VHs-AWw), Aug 2022