It's a trade-off
The Sigma 14mm f/1.8 DG HSM Art and Tamron 20-40mm f/2.8 Di III VXD differ mainly in focal length — 14mm versus 20-40mm — so the right choice comes down to the field of view you want rather than one lens outperforming the other. The Tamron 20-40mm f/2.8 Di III VXD offers a lighter body (820g less) and closer minimum focusing, while the Sigma 14mm f/1.8 DG HSM Art offers a lower price (£57.35 less) and a wider f/1.8 aperture. Both share a compatible lens mount.
Our take: If you're unsure, the Sigma 14mm f/1.8 DG HSM Art is the safer value pick — step up to the Tamron 20-40mm f/2.8 Di III VXD only if you want a lighter body (820g less) and closer minimum focusing.
It really comes down to weight versus price — pick the one whose strengths match how you shoot.
…if you want:
| Tamron 20-40mm f/2.8 Di III VXD | Sigma 14mm f/1.8 DG HSM Art |
|---|---|
| Price £441.63on Amazon | Price £384.28on Amazon |
| Tamron |
Lenny's verdictBETALenny couldn't answer just now — it's usually temporary.
…if you want:
| BrandSigma |
Sensor Format
| Sensor Format
|
Mount
| Mount
|
| CategoryUltra Wide | CategoryUltra Wide |
| Use Case EverydayLandscapeStreetTravelVlogging | Use Case LandscapeAstroLow LightArchitectural |
| Focal Length20mm - 40mm | Focal Length14mm |
| Angle of View94.5° - 56.8° | Angle of View114.2° |
| Aperture f/2.8 (max)f/22 (min) | Aperture f/1.8 (max)f/16 (min) Wider aperture |
| Blades9 | Blades9 |
| Circular ApertureYes | Circular ApertureYes |
| Min Focus Distance0.17m Focuses closer | Min Focus Distance0.27m |
| Max Magnification1:3.8 | Max MagnificationN/A |
| Filter Diameter67mm | Filter Diameter0mm |
| Weight365g Lighter | Weight1185g |
| StabilizationNo (relies on camera) | StabilizationNo (relies on camera) |
| Auto FocusYes | Auto FocusYes |
| Release Date2022 | Release Date2017 |
| View full detailsTamron 20-40mm f/2.8 Di III VXD | View full detailsSigma 14mm f/1.8 DG HSM Art |
