Photo: Henry Söderlund (CC BY 2.0)
Quick answer
A compact wide-angle prime for full-frame mirrorless in Sigma's I series, with a metal body and aperture ring. It offers an f/2 aperture.
Pros
- Metal construction
- Aperture ring
- Compact at about 370 g
Cons
- f/2 is slower than f/1.4 options
- Some vignetting wide open
Verdict
Think of it as a well-built small wide prime for Sony users, favoring portability over maximum light.
About this lens
This 20mm f/2 full-frame fast wide-angle prime lens from Sigma fits Sony E mount cameras, from the Sigma Contemporary line. The wide view suits landscapes, architecture and environmental shots.
Sigma 20mm F2 DG DN | Contemporary 022 specifications
- Brand
- Sigma
- Mount
- Sony E
- Focal length
- 20mm
- Maximum aperture
- f/2.0
- Lens type
- Prime
- Format coverage
- full-frame
- Optical construction
- 13 elements in 11 groups
- Aperture blades
- 9
- Autofocus motor
- Stepping motor
- Minimum focus distance
- 0.22 m
- Maximum magnification
- 0.15x
- Filter thread
- 62 mm
- Weight
- 370 g
- Length
- 74.4 mm
- Diameter
- 70 mm
Specification source: sigmaphoto.com
What can you shoot with the Sigma 20mm F2 DG DN | Contemporary 022?
- Landscape and astro
- Street and travel
- Interiors
Its fast maximum aperture helps in dim light and gives good subject separation.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 20mm | 84° | 94.5° |
| APS-C | 1.5x | 30mm | 61.9° | 71.6° |
Frequently asked questions
Is the Sigma 20mm F2 DG DN Contemporary 022 part of Sigma's I series?
Yes. Sigma's I series pairs compact primes with metal bodies and aperture rings, and this 20mm follows that design.
Is the Sigma 20mm F2 DG DN Contemporary 022 good for astrophotography?
It is usable, though f/2 is slower than dedicated f/1.4 astro primes, so exposures need to be longer or ISO higher.
Does the Sigma 20mm F2 DG DN Contemporary 022 work with Sony E?
Yes. It is available in native Sony E-mount, so autofocus and aperture control work without an adapter.
Alternatives for Sony E from other brands
All Sony E lensesSame mount, overlapping focal range, closest maximum aperture first.
