20mm F1.4 DG DN | A Refurbished

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  • World's first 20mm F1.4 full-frame mirrorless lens
  • Outstanding optical performance
  • Dust and splash resistant structure
  • Water and oil repellent coating
  • Aperture ring with de-click function
  • Manual Focus Lock switch
  • Lens Heater Retainer
  • Rear Filter Holder
  • Responsive, quiet autofocus
  • Compatible with Lens Aberration Correction*


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

Explore the 20mm F1.4 DG DN | A Refurbished

20mm F1.4 DG DN | A

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, and others) 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 a variety of improved technologies.


Lens Specifications
Lens Construction
17 elements in 15 groups
Lens Construction
Angle of View
Full Frame: 94.5°
APS-C: 70.7°
Number of Diaphragm Blades
11 (rounded)
Maximum Aperture
Minimum Aperture
Minimum Focusing Distance
23cm / 9.1 in.
Filter Size
Maximum Magnification
L-Mount: 635g / 22.4 oz.
Sony E: 630g / 22.2 oz.
Dimensions (Diameter x Length)
L-Mount: 87.8 x 111.2mm / 3.5 x 4.4 in.
Sony E: 87.8 x 113.2mm / 3.5 x 4.5 in.
What's in the BoxCase, Petal-type LENS HOOD LH878-04, FRONT CAP LCF-82 III, REAR CAP LCR II, GUIDE PLATE GP-21
Firmware Information

Learn more about the latest firmware.

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Camera Compatibility

Check compatibility of lenses with your camera make and model.

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Geometrical MTF Chart
10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open.
Diffraction MTF Chart
Diffraction MTF takes diffracted light at every aperture into account which is very close to actual image data. Geometrical MTF does not consider the diffraction quality of light, yet it tends to show higher values than actual image.


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