Tamron Di III VXD 20-40mm f/2.8
Combining a constant f/2.8 aperture with a compact 365g build, this lens stands out for its fast VXD linear autofocus and useful 20-40mm range on full-frame Sony E-mount bodies. Its 6.7-inch minimum focus distance and moisture-sealed construction add practical close-up capability and durability in a portable package. This lens is best for travel photographers and vloggers who prioritize a lightweight, fast standard zoom over telephoto reach.
Focal length 20-40mm
Aperture f/2.8
Mount Sony E
Weather Sealed Yes
Weight 366 g
af type VXD (Voice-coil eXtreme-torque Drive)
lens type zoom
78 Overall Score
Price ₹0
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Snapshot
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.
Owner sentiment has held steady over time
85/100Our AI sentiment read
Based on 13 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Zoom |
| Focal Length Min | 20 |
| Focal Length Max | 40 |
| Elements | 12 |
| Groups | 11 |
| Aspherical Elements | 1 |
| ED Elements | 4 |
| Coating | fluorine coating |
Aperture
| Max Aperture | f/2.8 |
| Min Aperture | f/2.8 |
| Constant | Yes |
Build
| Mount | Sony E |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.4 kg / 0.8 lbs |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | VXD (Voice-coil eXtreme-torque Drive) |
| Stabilization | No |
Focus
| Min Focus Distance | 170 |
| Max Magnification | 1:3.8 |
vs Competition
| Spec | Tamron Di III VXD 20-40mm f/2.8 | Sigma Contemporary 18-50mm f/2.8 DC DN | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E PZ 16-50mm f/3.5-5.6 OSS | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 20-40mm | 18-50mm | 17-28mm | 12-35mm | 16-50mm | 28-70mm |
| Max Aperture | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/22 |
| Mount | Sony E | Sony E | Nikon Z | Micro Four Thirds | Sony E | Canon RF |
| Stabilization | false | false | false | true | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 366 | 290 | 450 | 306 | 107 | 495 |
| AF Type | VXD (Voice-coil eXtreme-torque Drive) | stepping motor | Stepping Motor | Autofocus | Autofocus | STM |
| Lens Type | zoom | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Tamron Di III VXD 20-40mm f/2.8 | 53.7 | 80.4 | 81.6 | 86.8 | 82.5 | 82.8 | 63.5 | 72 | 29.5 | 36.7 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.6 | 80.4 | 86.5 | 90.8 | 82.5 | 82.8 | 80.5 | 78.5 | 90.1 | 36.7 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.6 | 85.7 | 76 | 84.9 | 88.4 | 82.8 | 90.8 | 68 | 71.4 | 36.7 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.7 | 80.4 | 85.8 | 50.2 | 86.7 | 82.8 | 63.5 | 80.4 | 86 | 97 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.7 | 73.7 | 98.6 | 43.2 | 69 | 75.9 | 63.5 | 83.1 | 82 | 93.5 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 87.6 | 23 | 72.9 | 78.9 | 86.7 | 20.1 | 98 | 77.3 | 90.1 | 98.6 |
