Sigma 49B969
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.
Focal length 20mm
Aperture f/2
Mount L-Mount
Weather Sealed Yes
Weight 4128 g
af type Autofocus
lens type prime
60 Overall Score
Price $769
Snapshot
Pros & Cons
Pros
- Strong bokeh (93rd percentile) 93rd
- Strong aperture (92nd percentile) 92nd
- Strong optical (84th percentile) 84th
- Strong macro (82nd percentile) 82nd
Cons
- Below average build (5th 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 5 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 | 4.1 kg / 9.1 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 49B969 | Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR | Tamron Di III 28-75mm f/2.8 VXD G2 | Panasonic Leica DG Vario-Elmarit H-ES12060 | Canon RF 28-70mm f/2.8 IS STM | Sony G SELP28135G.SYX |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 18-140mm | 28-75mm | 12-60mm | 28-70mm | 28-135mm |
| Max Aperture | f/2 | f/3.5 | f/2.8 | f/2.8 | f/22 | f/4 |
| Mount | L-Mount | Nikon Z | Sony E | Micro Four Thirds | Canon RF | Sony E |
| Stabilization | false | true | false | true | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 4128 | 315 | 540 | 320 | 495 | 420 |
| AF Type | Autofocus | stepping motor | VXD | linear motor | STM | SSM |
| 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 49B969 | 54.6 | 93.2 | 5.4 | 81.6 | 84.1 | 91.5 | 33.6 | 11.1 | 37.9 |
| Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR Compare | 86.9 | 77.7 | 83.9 | 82.6 | 88.5 | 79.7 | 96.2 | 32 | 96.6 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88 | 67.2 | 87.3 | 87.8 | 85.7 | 78.2 | 83.2 | 37.9 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98 | 88 | 83.1 | 50.3 | 90.2 | 85.7 | 93.1 | 63.7 | 83.2 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 86.9 | 25.9 | 70.2 | 80.4 | 85 | 22.6 | 77.1 | 87.9 | 98.5 |
| Sony G SELP28135G.SYX Compare | 94.2 | 80.1 | 75.5 | 31.1 | 86.9 | 69.8 | 92.3 | 50.4 | 92.8 |
Price
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
