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Sigma 20mm F2 DG DN Contemporary Lens

The Sigma 20mm f/2 DG DN is a 20mm f/2 lens designed for L-Mount, Sony E mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Sigma 20mm F2 DG DN Contemporary Lens

Sigma 20mm F2 DG DN Contemporary Lens

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Lens Overview — Sigma 20mm f/2 DG DN

The Sigma 20mm F2 DG DN Contemporary is a wide-angle prime lens built for full-frame mirrorless systems, available in both L-Mount and Sony E mount configurations. With a maximum aperture of f/2, this lens sits in an attractive sweet spot for a 20mm prime, offering a notably fast aperture for a wide-angle focal length. At 370g, it strikes a reasonable balance between build substance and portability, making it a practical companion for shooters who want a wide prime without excessive bulk in their kit.

The 62mm filter thread is a manageable size for accessories like polarizers and ND filters. As a prime lens, it covers a full-frame image circle, meaning it delivers its full 20mm field of view on any compatible full-frame mirrorless body. Both autofocus and manual focus are supported, giving shooters flexibility depending on the shooting scenario.

No image stabilization is present in this lens, so shooters relying on stabilization will need to lean on in-body systems if available. The Contemporary line designation from Sigma signals a focus on practical performance and value within the broader mirrorless ecosystem, and this lens fits squarely into wide-angle and landscape categories.

Key Features — Sigma 20mm f/2 DG DN

20mm f/2 Wide-Angle Prime: A fast maximum aperture of f/2 is unusually bright for a 20mm prime, giving more flexibility in low light and greater depth-of-field control than typical f/2.8 wide-angles.

Full-Frame Coverage: Designed for full-frame mirrorless sensors, delivering the full 94-degree angle of view on any compatible full-frame body.

L-Mount & Sony E Compatibility: Available in both L-Mount and Sony E mount, making it accessible to shooters using Leica, Panasonic, Sigma, or Sony full-frame mirrorless systems.

Autofocus Support: Built-in autofocus motor enables reliable subject tracking and fast acquisition, with manual focus also available for precise control.

Compact 370g Build: At 370g, this lens is notably lightweight for a fast full-frame wide-angle prime, keeping a mirrorless kit portable for travel and outdoor use.

62mm Filter Thread: A 62mm front thread is a widely supported size, making it straightforward to use polarizers, ND filters, and other common accessories.

Lens Specifications — Sigma 20mm f/2 DG DN

Sigma 20mm f/2 DG DN full specifications
SpecDetail
Use CasesTravel, Astrophotography, Video / Cinematography
Lens TypeWide-Angle
FormatFull Frame
Zoom/PrimePrime
Focal Length20mm
Maximum Aperturef/2
Camera SystemMirrorless
Lens MountL-Mount, Sony E
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Filter Thread62mm

Description — Sigma 20mm f/2 DG DN

The Sigma 20mm F2 DG DN Contemporary is a prime wide-angle lens purpose-built for full-frame mirrorless camera systems. It is offered in two mount options — L-Mount and Sony E — covering a broad range of compatible mirrorless bodies. The lens features a maximum aperture of f/2, which is notably fast for the 20mm focal length category.

Autofocus is supported alongside manual focus, providing flexibility across different shooting styles and situations. The lens weighs in at 370g, keeping things manageable without feeling insubstantial, and uses a 62mm filter thread for straightforward accessory filter use. It is worth noting that no image stabilization is built into this lens.

As part of Sigma's Contemporary lineup, the 20mm F2 DG DN is positioned as a wide-angle prime suitable for mirrorless shooters looking for full-frame coverage and a fast aperture in a lens that doesn't overwhelm the kit with size or weight.

Pros — Sigma 20mm f/2 DG DN

  • ✓Fast f/2 maximum aperture for a 20mm wide-angle prime
  • ✓Available in both L-Mount and Sony E mount, covering two major mirrorless ecosystems
  • ✓Full-frame coverage ensures compatibility with full-frame mirrorless bodies

Cons — Sigma 20mm f/2 DG DN

  • ✗No image stabilization, requiring reliance on in-body stabilization systems
  • ✗Fixed 20mm focal length offers no zoom flexibility
  • ✗62mm filter thread, while common, may not match filters from other lenses in a shooter's kit

Videos — Sigma 20mm f/2 DG DN

Sigma 20mm F2 DG DN Review — DPReview TV

Resources & Downloads — Sigma 20mm f/2 DG DN

Manuals & Guides

Frequently Asked Questions — Sigma 20mm f/2 DG DN

Which camera mounts is this lens compatible with?+
The Sigma 20mm F2 DG DN Contemporary is available in two mount options: L-Mount and Sony E mount. Both versions are designed for mirrorless camera systems.
Does this lens cover full-frame sensors?+
Yes, the lens format is specified as Full Frame, meaning it is designed to cover full-frame mirrorless sensors without vignetting on compatible bodies.
Does the Sigma 20mm F2 DG DN have image stabilization?+
No, image stabilization is listed as None for this lens. Shooters who need stabilization will need to rely on any in-body image stabilization provided by their camera body.
What filter size does this lens use?+
The lens has a 62mm filter thread, which is compatible with a wide range of 62mm screw-in filters such as polarizers and neutral density filters.
How heavy is this lens?+
The Sigma 20mm F2 DG DN Contemporary weighs 370g, making it a relatively compact and lightweight option for a full-frame wide-angle prime with an f/2 aperture.
Is this lens a zoom or a prime?+
This is a prime lens with a fixed 20mm focal length. It does not offer any zoom capability, with both the minimum and maximum focal length set at 20mm.

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