20mm F2 DG DN | C

As low as $699
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  • All-metal construction
  • Manual aperture ring
  • Arc-style focus mode switch
  • High-speed, accurate autofocus
  • Magnetic lens cap and metal lens hood
  • Mount with dust and splash-resistant structure
  • Designed to minimize flare and ghosting
  • Compatible with Lens Aberration Correction*


*Function available on supported cameras only. Available corrections / functionality may vary depending on camera model.

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Explore the 20mm F2 DG DN | C

20mm F2 DG DN | C


  • Best Full Frame Prime Wide-Angle Lens, TIPA World Awards, 2022

    Best Full Frame Prime Wide-Angle Lens, TIPA World Awards, 2022

  • 2022 EISA Awards - Best Wide Angle Lens

    2022 EISA Awards - Best Wide Angle Lens

  • Best Wide-Angle Prime Lens, Lucie Technical Awards, 2022

    Best Wide-Angle Prime Lens, Lucie Technical Awards, 2022

For Sony & L-Mount shooters

SIGMA's DG DN lenses are made exclusively for mirrorless cameras, including Sony E-mount and L-Mount (SIGMA, Panasonic, Leica) systems. These full-frame lenses are designed to take advantage of the benefits offered by mirrorless camera bodies, including more compact dimensions, in-camera corrections, and improved autofocus technology.


The one-and-only I series

SIGMA I series lenses are premium, compact prime lenses that are both strikingly beautiful and optically impressive. With full-frame coverage, all-metal construction, exceptional autofocus performance, and gorgeous (yet functional) touches like a knurled manual aperture ring and a magnetic lens cap, I series lenses are designed to enhance both the artistic potential and the tangible experience of mirrorless photography.


Make sure you get your 4-Year Warranty

All SIGMA lenses come with a 4-Year Warranty in the US, but only if you buy from SIGMA America directly or a SIGMA Authorized Dealer. Gray market importers undercut legitimate retailers, deceive well-intentioned customers, and sell products that are ultimately not eligible for warranty service. Make sure you are buying from a trusted source so your lens is covered!


Lens Specifications
Lens Construction
11 groups, 13 elements
(1 FLD, 1 SLD, 3 aspherical)
Lens Construction
Angle of View
Number of Diaphragm Blades
9 (rounded)
Maximum Aperture
Minimum Aperture
Minimum Focusing Distance
22cm / 8.7 in.
Filter Size
Maximum Magnification
L-Mount: 370g / 13.1 oz.
Sony E: 370g / 13.1 oz.
L-Mount: 70 x 72.4mm / 2.8 x 2.9 in.
Sony E: 70 x 74.4mm / 2.8 x 2.9 in.
What's in the BoxMagnetic metal lens cap (LCF62-01M), petal type lens hood (LH656-03)
Firmware information

Learn more about the latest firmware.

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Lens Compatibility Chart

Check compatibility of lenses with your camera make and model.

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