History

    Incredible rendering
    performance delivers
    unprecedented visual experiences.
    Enjoy enhanced control
    of light and composition.

    An ultra-wide-angle lenswith F1.4 brightness.

    With a focal length of 20mm and F1.4 aperture, this lens delivers outstanding large-aperture brightness and bokeh, delivering unprecedented visual experiences.

    SIGMA has extensive experience in leveraging its advanced design capabilities and leading-edge technologies to craft large-aperture prime lenses that bring out the full potential of ultra-high-megapixel DSLRs. As its latest achievement in this category, SIGMA has created an ultra-wide-angle lens with F1.4 brightness. With a focal length of 20mm and F1.4 aperture, this lens delivers outstanding large-aperture brightness and bokeh, delivering unprecedented visual experiences. Allowing the photographer to leverage the perspective provided by the wide -angle and the shallow depth of field provided by the large aperture, this lens is ideal not only for such ultra-wide-angle subjects as landscapes and starry skies, but also for snapshots in low light, indoor photography, portraits with a natural bokeh effect, and much more.

    Art line delivers high-level artistic expression

    SIGMA is organizing all its interchangeable lenses into three product lines: Contemporary, Art, and Sports, each with a distinctive concept. Designed with a focus on sophisticated optical performance and abundant expressive power, our Art line lenses deliver high-level artistic expression. Offering astonishing rendering performance that meets the highest standard, they are perfect for landscapes, portraits, still-lifes, close-ups, and casual snaps. They are made for the kind of photography that unleashes the inner artist. A powerful ally in every genre of photography, SIGMA’s Art line lenses excel both in the studio for formal works and outdoors for impressive shots of architecture, starry skies, and many other scenes.

    Features

    Advanced technologies make a 20mm F1.4 lens possible

    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.

    * Left side: The aspherical glass element incorporated in the SIGMA 18-35mm F1.8 DC HSM | Art、Right side: The aspherical glass element incorporated in the SIGMA 20mm F1.4 DG HSM | Art.

    Minimized chromatic aberrations

    This lens minimizes chromatic aberrations, a common issue in large-aperture ultra-wide-angle lenses. It features two FLD (“F” Low Dispersion) glass and five SLD (Special Low Dispersion) glass elements to minimize transverse chromatic aberration, which is mainly visible around the edge of the image. The optimized lens power distribution helps minimize axial chromatic aberration. As a result, this lens delivers high image quality in every situation without color smearing, and its rendering performance is consistently sharp with high contrast.

    • FLD glass
    • SLD glass
    • Aspherical lens

    Minimized distortion

    Distortion is a common issue in wide-angle lenses, and it is not possible to correct it simply by changing the aperture value. For this reason, a lens must be designed from the start to minimize this issue. By adjusting the incidence angle of light starting with the first lens element and incorporating optimally positioned aspherical glass elements, the SIGMA 20mm F1.4 DG HSM | Art lens minimizes distortion throughout the entire image.

    Distortion

    Exclusive low-dispersion glass

    The degree to which light is refracted by glass depends on the light’s wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as “secondary spectrum” may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (“F” Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration.

    Flare and ghosting reduction

    From an early stage in the lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. SIGMA’s Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions.

    Vignetting

    F1.4
    F2.8
    F5.6

    The ideal high-speed lens for snapshots and much more

    Top-level performance for the ultra-high-megapixel era

    At the dawn of the film camera, there was very little high-sensitivity film, and bright lenses that worked well in low-light conditions came to be known as “high-speed lenses.” These lenses are ideal for shooting indoors, in the evening, under cloudy skies, or in any low-light situation. Since the SIGMA 20mm F1.4 DG HSM | Art provides the benefits of an ultra-wide angle lens with minimal distortion, it is ideal for photographing landscapes, starry skies, and architecture. In addition to capturing wide-angle shots with the whole scene in focus, the photographer can leverage wide-open aperture to take snapshots with the subject in focus and the background blurred with an attractive bokeh effect. Designed for ultra-high-megapixel digital cameras, this high-performance lens delivers outstanding resolution and high-clarity image quality even at wide-open aperture.

    The finest in materials,
    usability and functionality.

    A refined, integrated design made
    with the photographer in mind

    In our new product lines, the lens caps and AF/MF switches are newly designed to improve usability. To ensure precise operation, internal parts feature generous use of metal and TSC (Thermally Stable Composite), which is highly compatible with metal parts. The lens barrel is engraved with the year of release for instant access to this information.

    Hyper Sonic Motor ensures high AF speed

    The Hyper Sonic Motor (HSM) ensures silent, high-speed autofocusing, while the optimized AF algorithm helps realize even smoother AF performance. At any time during AF, users may access MF simply by rotating the focus ring. This feature makes faster focus adjustment possible, since there is no need to use the AF/MF focus mode switch. Also, the optional SIGMA USB DOCK allows the user to set the lens to conventional full-time manual focus override.

    Note: The operation of full-time MF may vary based on mount type.

    Metal lens cap available (sold separately)

    Matching the high-quality finish of the lens exterior, optionally available metal lens cap LC907-02 will go on sale simultaneously with the lens. Featuring materials identical to those of the lens barrel, this metal lens cap establishes a new level of unity within SIGMA’s new lens lines.

    Rounded diaphragm

    The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.

    High-precision,
    rugged brass bayonet mount

    The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.

    ESSENTIALS

    You'll find our philosophy and craftsmanship
    in every product

    Our new lineup fully expresses our approach to lenses and photography itself. All of our lenses belong to one of three lines—Contemporary, Art, or Sports—all of which share our development philosophy and advanced manufacturing system. High performance, high quality, and high end in every respect, these lenses give people who love photography lasting value and consistent, exciting results. The secret is our passion for craftsmanship that we put into every production process and every product.

    Specifications

    20mm F1.4 DG HSM | Art

    Lens Construction

    • FLD glass
    • SLD glass
    • ASPHERICAL LENS

    Lens Construction

    15 elements in 11 groups

    Angle of View

    • 94.5°

    Number of Diaphragm Blades

    9 (Rounded diaphragm)

    Minimum Aperture

    F16

    Minimum Focusing Distance

    27.6 cm / 10.9 in.

    Maximum Magnification Shooting

    1:7.1

    Dimensions (Diameter × Length)

    • SIGMA SA-Mount
      φ90.7mm × 129.8mm / φ3.6in. × 5.1in.
    • Sony E-Mount
      φ90.7mm × 155.8mm / φ3.6in. × 6.1in.
    • L-Mount
      φ90.7mm × 153.75mm / φ3.5in. × 6in.
    • *The length of a lens is measured from the filter surface to its mount.

    Weight

    • SIGMA SA-Mount
      950g / 33.5oz.
    • Sony E-Mount
      1,055g / 37.2oz.
    • L-Mount
      1,035g / 36.5oz.

    Edition Number

    A015

    Supplied Accessories

    Case, Cover Lens Cap (LC907-01) supplied

    Corresponding AF Mounts / Barcode No.

    • SIGMA SA-Mount
      00-85126-41256-2
    • Nikon F Mount
      00-85126-41255-5
    • Canon EF Mount
      00-85126-41254-8
    • Sony E-Mount
      00-85126-41265-4
    • L-Mount
      00-85126-41269-2

    Technologies

    Performance / Data

    MTF Chart

    Diffraction MTF

    Geometrical MTF

    The MTF chart gives the result at the wide-open aperture
    Spatial frequency S:Sagittal Line M:Meridional Line
    10lp/mm
    30lp/mm

    MTF chart guide

    Distortion

    Vignetting

    F1.4
    F2.8
    F5.6

    Vignetting guide

    Product Lineup

    20mm F1.4 DG HSM | Art

    • SIGMA SA-mount

      Supplied Accessories

      Case, Cover Lens Cap (LC907-01) supplied

      Barcode No.
      00-85126-41256-2
    • Nikon F mount

      Supplied Accessories

      Case, Cover Lens Cap (LC907-01) supplied

      Barcode No.
      00-85126-41255-5
    • Canon EF mount

      Supplied Accessories

      Case, Cover Lens Cap (LC907-01) supplied

      Barcode No.
      00-85126-41254-8
    • Sony E-mount

      Supplied Accessories

      Case, Cover Lens Cap (LC907-01) supplied

      Barcode No.
      00-85126-41265-4
    • L-Mount

      Supplied Accessories

      Case, Cover Lens Cap (LC907-01) supplied

      Barcode No.
      00-85126-41269-2

    Accessories

    Supplied Accessories

    FRONT CAP LC907-01

    Barcode No.
    00-85126-93192-6

    REAR CAP LCR Ⅱ

    * The image is for SIGMA.

    • L-Mount

      Barcode No.
      00-85126-93725-6
    • Sony E-mount

      Barcode No.
      00-85126-92987-9
    • SIGMA SA-mount

      Barcode No.
      00-85126-92949-7
    • Nikon F mount

      Barcode No.
      00-85126-92950-3
    • Canon EF mount

      Barcode No.
      00-85126-92951-0

    Separately Sold Accessories

    FRONT CAP LC907-02

    Barcode No.
    00-85126-93197-1

    USB DOCK UD-01

    By connecting a SIGMA Art, Contemporary, or Sports lens to a computer with the SIGMA USB DOCK, photographers can update the lens firmware and adjust focus position and other parameters.

    • SIGMA SA-mount

      Barcode No.
      00-85126-87856-6
    • Canon EF mount

      Barcode No.
      00-85126-87854-2
    • Nikon F mount

      Barcode No.
      00-85126-87855-9

    USB DOCK UD-11

    • L-Mount

      Barcode No.
      00-85126-87869-6

    SIGMA MOUNT CONVERTER MC-11

    The SIGMA MOUNT CONVERTER MC-11 allows you to use your SIGMA SA mount and SIGMA EOS mount interchangeable lenses with the Sony E-mount camera body.

    • SIGMA SA-E
      SIGMA SA-mount

      Barcode No.
      00-85126-93251-0
    • CANON EF-E
      Canon EF mount

      Barcode No.
      00-85126-93250-3

    SIGMA MOUNT CONVERTER MC-21

    The SIGMA MOUNT CONVERTER MC-21 allows SIGMA SA mount and SIGMA’s CANON EF mount interchangeable lens owners to use their lens investment on L-Mount camera bodies.

    • SIGMA SA-L
      SIGMA SA-mount

      Barcode No.
      00-85126-93724-9
    • CANON EF-L
      Canon EF mount

      Barcode No.
      00-85126-93723-2

    Catalogs / Resources

    Manuals / Brochures

    Impressions / Samples