Sigma AFK9B0
Focal length 135mm
Aperture f/1.8
Mount Sigma SA
format coverage full-frame
Weather Sealed Yes
Weight 90 g
af type Hyper Sonic AF Motor
lens type prime
76 Overall Score
Price €218
Snapshot
Pros & Cons
Pros
- Strong bokeh (97th percentile) 97th
- Strong portability (97th percentile) 97th
- Strong affordability (85th percentile) 85th
- Strong af (84th percentile) 84th
Cons
- Below average wide angle (10th percentile)
- Below average video (29th percentile)
- Below average versatility (33rd percentile)
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 135 |
| Focal Length Max | 135 |
| Elements | 13 |
| Groups | 10 |
| Aspherical Elements | 0 |
| ED Elements | 4 |
| Coating | Super Multi-Layer Coating |
Aperture
| Max Aperture | f/1.8 |
| Min Aperture | f/16 |
| Constant | Yes |
| Diaphragm Blades | 9 |
Build
| Mount | Sigma SA |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.1 kg / 0.2 lbs |
| Filter Thread | 105 |
AF & Stabilization
| AF Type | Hyper Sonic AF Motor |
| Stabilization | No |
Focus
| Min Focus Distance | 875 |
| Max Magnification | 1:5 |
vs Competition
| Spec | Sigma AFK9B0 | Zeiss Batis 85mm f/1.8 | Sony G SEL16F18G | Nikon NIKKOR 2191 | Tamron Di III VC 28-300mm f/4-7.1 VXD | Canon RF 24-105mm f/4L IS USM |
|---|---|---|---|---|---|---|
| Focal Length | 135mm | 85mm | 16mm | 28-300mm | 28-300mm | 24-105mm |
| Max Aperture | f/1.8 | f/1.8 | f/1.8 | f/3.5-5.6 | f/4-7.1 | f/4 |
| Mount | Sigma SA | Sony E | Sony E | Nikon F | Sony E | Canon RF |
| Format Coverage | full-frame | full-frame | full-frame | full-frame | full-frame | full-frame |
| Stabilization | false | true | false | true | true | true |
| Weather Sealed | true | true | true | false | true | true |
| Weight (g) | 90 | 452 | 304 | 82 | 590 | 700 |
| AF Type | Hyper Sonic AF Motor | Linear Autofocus Motor | XD linear motors | Silent Wave Motor | VXD linear motor | Nano USM |
| Lens Type | prime | prime | prime | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Reach | Video | Optical | Aperture | Wide Angle | Portability | Versatility | Social Proof | Affordability | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sigma AFK9B0 | 83.5 | 97 | 77.4 | 52 | 78.5 | 28.6 | 63.9 | 74.8 | 9.8 | 96.8 | 33 | 66.1 | 84.5 | 36.2 |
| Zeiss Batis 85mm f/1.8 Compare | 95.4 | 82.9 | 77.4 | 28.9 | 66 | 72.3 | 48.1 | 74.8 | 19.7 | 56 | 33 | 88.1 | 34.3 | 82.7 |
| Sony G SEL16F18G Compare | 95.4 | 22 | 90.8 | 63.3 | 7.5 | 72.3 | 88.1 | 74.8 | 88.3 | 73.8 | 33 | 88.1 | 46.3 | 36.2 |
| Nikon NIKKOR 2191 Compare | 83.5 | 69.7 | 66.2 | 72 | 87.6 | 63.3 | 90 | 26.4 | 62.4 | 97.6 | 98.1 | 70 | 44.8 | 92.9 |
| Tamron Di III VC 28-300mm f/4-7.1 VXD Compare | 95.4 | 59.6 | 90.8 | 74.7 | 87.6 | 72.3 | 90.7 | 16.8 | 62.4 | 40.7 | 98.1 | 39.6 | 44.3 | 89 |
| Canon RF 24-105mm f/4L IS USM Compare | 89.9 | 61.4 | 90.8 | 60.7 | 73.9 | 84.3 | 82.6 | 16.8 | 74.5 | 32.1 | 91.9 | 70 | 46.9 | 93.4 |
Price
Value & Pricing
From €218
Amazon 1 offer From €218
We started tracking prices for this product on Nov 9, 2026. The chart appears once we have more data.
Usage Scores
- Macro36.4
- Overall76
- Budget91.6
- Street75.3
- Travel57.7
- Portrait80.9
- Landscape41.1
- Professional70.6
- Video Cinema41.4
- Wildlife Sports58
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
