Sigma Contemporary 20mm f/2 DG 20mm
Weighing just 370g with a weather-sealed all-metal build, this 20mm f/2 prime delivers ultra-wide composition and fast aperture in a compact L-mount package. The STM autofocus enables smooth video pulls, while three aspherical and two ED elements minimize distortion and aberrations across the frame. Best for travel and landscape photographers who need a lightweight, durable wide-angle lens with decent low-light capability for handheld shooting.
Focal length 20mm
Aperture 22
Mount Sony E
Weather Sealed Yes
Weight 370 g
af type Autofocus
lens type prime
51 Overall Score
Price MX$671
Snapshot
Pros & Cons
Pros
- Strong optical (84th percentile) 84th
- Strong macro (79th percentile) 79th
- Strong build (78th percentile) 78th
Cons
- Below average social proof (6th percentile)
- Below average aperture (24th percentile)
- Below average bokeh (28th 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 4 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 and Nano Porous Coating (NPC) |
Aperture
| Max Aperture | 22 |
| Min Aperture | 2 |
| Constant | Yes |
| Diaphragm Blades | 9 |
Build
| Mount | Sony E |
| 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 20mm | Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD | Nikon NIKKOR Z 28-400mm f/4-8 VR | Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 | Viltrox 13mm F1.4 f/1.4 E STM Auto Focus Ultra Wide Angle | Canon EF-S 18-135mm f/3.5-5.6 IS USM |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 18-300mm | 28-400mm | 50-200mm | 13mm | 18-135mm |
| Max Aperture | 22 | f/3.5 | f/4 | f/2.8 | f/1.4 | f/3.5 |
| Mount | Sony E | Fuji X | Nikon Z | Micro Four Thirds | Sony E | Canon EF-S |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | true | false | true | true | false | false |
| Weight (g) | 370 | 92 | 726 | 655 | 415 | 515 |
| AF Type | Autofocus | VXD linear motor | STM | linear motor | STM | STM |
| Lens Type | prime | zoom | zoom | telephoto | Wide-Angle | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | Af | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma Contemporary 20mm f/2 DG 20mm | 54.5 | 28.2 | 78.1 | 78.6 | 84.3 | 24.4 | 34.2 | 5.6 | 36 |
| Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD Compare | 98.3 | 74.9 | 96.6 | 87.7 | 74.6 | 76.9 | 99.2 | 83.1 | 81.3 |
| Nikon NIKKOR Z 28-400mm f/4-8 VR Compare | 86.9 | 77.8 | 51.6 | 81.3 | 97 | 71.2 | 98.9 | 83.1 | 98.3 |
| Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 Compare | 98.3 | 86.1 | 55.3 | 23.1 | 95.9 | 83.7 | 88.3 | 65.9 | 96.4 |
| Viltrox 13mm F1.4 f/1.4 E STM Auto Focus Ultra Wide Angle Compare | 86.9 | 96.6 | 42.1 | 89.4 | 82.6 | 96.4 | 34.2 | 74 | 81.3 |
| Canon EF-S 18-135mm f/3.5-5.6 IS USM Compare | 86.9 | 74.9 | 47.3 | 33.2 | 80.1 | 76.9 | 96 | 78 | 92.6 |
Price
Value & Pricing
From MX$671
Amazon.com.mx 1 offers From MX$671
May 7, 2026 MX$671
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
