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.
Snapshot
Pros & Cons
Pros
- Strong bokeh (93rd percentile) 93rd
- Strong aperture (91st percentile) 91st
- 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 | Serounder 52mm Fisheye | Xuan XuanLens 32mm F/10 | Pentax D FA 15-30mm f/2.8 ED SDM WR | spovan HPL-N-2 | Vivitar VIV-CL-55 |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 52mm | 32mm | 15-30mm | - | 55mm |
| Max Aperture | f/2 | - | f/10 | f/22 | - | - |
| Mount | L-Mount | Multiple | Canon EF-M | Pentax K | Nikon F | 55mm |
| Stabilization | false | true | true | false | true | false |
| Weather Sealed | true | false | false | true | false | false |
| Weight (g) | 4128 | 230 | 41 | 1040 | 50 | 136 |
| AF Type | Autofocus | - | manual focus only | SDM | - | manual focus only |
| Lens Type | prime | fisheye | prime | zoom | prime | macro |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma 49B969 | 54.6 | 93.2 | 5.4 | 81.5 | 84.1 | 91.4 | 33.6 | 11.1 | 37.9 |
| Serounder 52mm Fisheye Compare | 54.6 | 68.3 | 81.2 | 91 | 34.7 | 69.8 | 33.6 | 8.5 | 83.2 |
| Xuan XuanLens 32mm F/10 Compare | 13.9 | 49.6 | 99.6 | 37.6 | 18.3 | 55.5 | 33.6 | 55 | 83.2 |
| Pentax D FA 15-30mm f/2.8 ED SDM WR Compare | 54.6 | 25.9 | 13.4 | 38.7 | 77.6 | 22.6 | 72 | 58.9 | 37.9 |
| spovan HPL-N-2 Compare | 54.6 | 68.3 | 99.4 | 11.8 | 18.3 | 69.8 | 33.6 | 9 | 83.2 |
| Vivitar VIV-CL-55 Compare | 13.9 | 68.3 | 91.4 | 11.8 | 18.3 | 69.8 | 33.6 | 15.5 | 37.9 |
Price
Value & Pricing
Amazon.co.uk 1 offer From £13
We started tracking prices for this product on May 7, 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.
