Sigma Contemporary 20mm f/2 DG
The f/2 maximum aperture and 13-element optical design with aspherical and ED glass deliver strong low-light performance and sharpness in a compact 370g body. Its all-metal, weather-sealed I Series construction and tactile aperture ring provide a premium handling experience rare at this size. This lens is best for environmental portrait and astrophotography shooters who need a fast, ultra-wide prime that won't weigh down a kit.
Snapshot
Pros & Cons
Pros
- Strong bokeh (93rd percentile) 93rd
- Strong aperture (90th percentile) 90th
- Strong optical (86th percentile) 86th
- Strong macro (81st percentile) 81st
Cons
- Below average build (7th percentile)
- Below average social proof (11th percentile)
- Below average versatility (34th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 2 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 20 |
| Focal Length Max | 20 |
| Elements | 13 |
| Groups | 11 |
| Aspherical Elements | 3 |
| ED Elements | 2 |
| Coating | Super Multi-Layer Coating, Nano Porous Coating (NPC) |
Aperture
| Max Aperture | f/2 |
| Min Aperture | f/2 |
| Constant | Yes |
| Diaphragm Blades | 9 |
Build
| Mount | L-Mount |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.4 kg / 0.8 lbs |
| Filter Thread | 62 |
AF & Stabilization
| AF Type | Autofocus |
| Stabilization | No |
Focus
| Min Focus Distance | 220 |
| Max Magnification | 1:6.67 |
vs Competition
| Spec | Sigma Contemporary 20mm f/2 DG | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 17-70mm | 17-28mm | 12-35mm | 18-135mm | 28-70mm |
| Max Aperture | f/2 | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/22 |
| Mount | L-Mount | Sony E | Nikon Z | Micro Four Thirds | Sony E | Canon RF |
| Stabilization | false | true | false | true | true | true |
| Weather Sealed | true | true | true | true | false | true |
| Weight (g) | 370 | 544 | 450 | 306 | 326 | 495 |
| AF Type | Autofocus | RXD | Stepping Motor | Autofocus | Linear motor | STM |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma Contemporary 20mm f/2 DG | 53.6 | 92.6 | 6.8 | 80.5 | 86 | 90.2 | 33.6 | 10.8 | 37.2 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.6 | 86.8 | 69.8 | 85.2 | 91.1 | 83.8 | 89.5 | 84.5 | 82.9 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.6 | 86.8 | 76.1 | 85.2 | 88.4 | 83.8 | 68 | 68.1 | 37.2 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.6 | 81.6 | 85.9 | 50.7 | 86.8 | 83.8 | 80.4 | 84.5 | 97 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98.1 | 75.1 | 73.4 | 40 | 79.1 | 77 | 95.8 | 89.1 | 82.9 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 87.6 | 23.4 | 72.9 | 79.4 | 86.8 | 20.6 | 77.4 | 89.1 | 98.6 |
Price
Value & Pricing
B&H Photo 1 offer From CA$1,060
We started tracking prices for this product on May 30, 2026. The chart appears once we have more data.
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
