Tamron Di III 20mm f/2.8 OSD 20mm
The 20mm f/2.8 prime delivers sharp, frame-wide clarity through an advanced optical design, paired with a fast, silent OSD stepping motor for hybrid stills and video work. Its ultra-wide perspective and bundled filter kit offer out-of-the-box readiness for expansive, immersive compositions. This lens is best for Sony FE shooters needing an affordable, lightweight wide-angle for travel and environmental portraiture.
Focal length 20mm
Aperture f/2.8
Mount Sony E
Weather Sealed Yes
af type OSD stepping motor
lens type prime
44 Overall Score
No current retailer price
Snapshot
Pros & Cons
Pros
- Strong aperture (88th percentile) 88th
- Strong bokeh (87th percentile) 87th
- Strong af (85th percentile) 85th
- Strong build (70th percentile) 70th
Cons
- Below average macro (12th percentile)
- Below average social proof (28th percentile)
- Below average versatility (33rd percentile)
- Below average stabilization (34th percentile)
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 20 |
| Focal Length Max | 20 |
| Coating | Fluorine |
Aperture
| Max Aperture | f/2.8 |
| Min Aperture | f/2.8 |
| Constant | Yes |
Build
| Mount | Sony E |
| Format | full-frame |
| Weather Sealed | Yes |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | OSD stepping motor |
Focus
| Max Magnification | 1:2 |
vs Competition
| Spec | Tamron Di III 20mm f/2.8 OSD 20mm | Nikon NIKKOR 20059 | Sigma Art 17-40mm f/1.8 DC | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS | Canon L Advanced Two Lens Kit |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 18-55mm | 17-40mm | 12-35mm | 18-135mm | 17-40mm |
| Max Aperture | f/2.8 | f/3.5 | f/1.8 | f/2.8 | f/3.5 | f/1.4 |
| Mount | Sony E | Nikon F | Fujifilm X | Micro Four Thirds | Sony E | Canon EF |
| Stabilization | false | true | false | true | true | false |
| Weather Sealed | true | false | true | true | false | true |
| Weight (g) | - | 205 | 535 | 306 | 326 | 499 |
| AF Type | OSD stepping motor | pulse stepping motor | HLA (High-response Linear Actuator) | Autofocus | Linear motor | USM |
| Lens Type | prime | zoom | zoom | zoom | zoom | wide-angle |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Tamron Di III 20mm f/2.8 OSD 20mm | 84.8 | 86.6 | 69.6 | 12.2 | 39.5 | 88.3 | 33.2 | 27.5 | 34.4 |
| Nikon NIKKOR 20059 Compare | 84.8 | 81.4 | 83.7 | 95.4 | 54.6 | 82.8 | 82.8 | 86.2 | 92.3 |
| Sigma Art 17-40mm f/1.8 DC Compare | 54 | 97 | 67.1 | 72.3 | 96.7 | 95.3 | 75.7 | 94.1 | 34.4 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 54 | 86.6 | 83.9 | 49 | 86.2 | 88.3 | 80.5 | 86.2 | 96.4 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 97.7 | 81.4 | 71 | 37.5 | 77.9 | 82.8 | 95.8 | 90.7 | 79.3 |
| Canon L Advanced Two Lens Kit Compare | 93.1 | 95.6 | 70.3 | 85.5 | 77.9 | 97.5 | 75.7 | 65.6 | 34.4 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
