20mm F1.4 DG HSM | Art Impression
The 20mm F1.4 has joined SIGMA’s Art line of lenses.
While SIGMA currently makes three Art primes including the 50mm F1.4, the 35mm F1.4, and the 24mm F1.4, the 20mm F1.4 expands the lineup toward the wide side.
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 Ratio
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
1,015g / 35.8oz. -
L-Mount
1,035g / 36.5oz.
Edition Number
A015
Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
Performance / Data
MTF Chart
Diffraction MTF
Geometrical MTF
| Spatial frequency | S:Sagittal Line | M:Meridional Line |
|---|---|---|
| 10lp/mm |
|
|
| 30lp/mm |
|
Distortion
Vignetting
| F1.4 |
|
|---|---|
| F2.8 |
|
| F5.6 |
|
Product Lineup
20mm F1.4 DG HSM | Art
-
SIGMA SA-mount
- Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
-
Nikon F mount
- Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
-
Canon EF mount
- Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
-
Sony E-mount
- Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
-
L-Mount
- Supplied Accessories
・Case
・COVER LENS CAP LC907-01
・REAR CAP LCR II
Support
20mm F1.4 DG HSM | Art
Accessories
Supplied Accessories
FRONT CAP LC907-01
REAR CAP LCR Ⅱ
* The image is for SIGMA.
-
L-Mount
-
Sony E-mount
-
SIGMA SA-mount
-
Nikon F mount
-
Canon EF mount
Separately Sold Accessories
FRONT CAP LC907-02
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
-
Canon EF mount
-
Nikon F mount
USB DOCK UD-11
Designed exclusively for the use with a SIGMA Contemporary, Art, or Sports lens and its accessories, the SIGMA USB DOCK allows users to update firmware and adjust the sensitivity of speed to the MF function* through the UD-11.
* Scope of adjustment varies depending on specifications of the individual product.
-
L-Mount
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 -
CANON EF-E
Canon EF mount
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 -
CANON EF-L
Canon EF mount
Catalogs / Resources
Manuals / Brochures
-
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SIGMA Lens Catalogue 2022 Autumn (Brochures)
-
![]()
20mm F1.4 DG HSM (Manuals)
Impressions / Samples
-
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20mm F1.4 DG HSM | Art Sample photo gallery
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Sony E-mount lenses ― from the ultra-high performing Art line.
Sony E-mount lenses
―from the ultra-high performing Art line. -
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blur
Dad wasn’t exactly stylish, and neither were the photographs he took—at least on the surface.
But what truth did they conceal?
