Sigma 18-50mm f/2.8 DC DN Contemporary vs Tamron 17-70mm f/2.8 Di III-A VC RXD
Both are Sony E mount zooms for pro standard zoom and everyday — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Sigma 18-50mm f/2.8 DC DN Contemporary | Tamron 17-70mm f/2.8 Di III-A VC RXD |
|---|---|---|
| Focal length | 18-50mm | 17-70mm |
| Max aperture | f/2.8 | f/2.8 |
| Type | zoom | zoom |
| Coverage | APS-C | APS-C |
| Mount | Sony E | Sony E |
Which should you buy?
- the Sigma 18-50mm f/2.8 DC DN Contemporary covers 18-50mm and the Tamron 17-70mm f/2.8 Di III-A VC RXD covers 17-70mm — pick the range that matches what you shoot
Where to buy
Check the Sigma 18-50mm f/2.8 DC DN Contemporary price on Amazon →
Check the Tamron 17-70mm f/2.8 Di III-A VC RXD price on Amazon →
FAQ
What's the difference between the Sigma 18-50mm f/2.8 DC DN Contemporary and the Tamron 17-70mm f/2.8 Di III-A VC RXD?
The Sigma 18-50mm f/2.8 DC DN Contemporary is 18-50mm f/2.8 zoom, APS-C; the Tamron 17-70mm f/2.8 Di III-A VC RXD is 17-70mm f/2.8 zoom, APS-C. Both fit the Sony E mount.
Do the Sigma 18-50mm f/2.8 DC DN Contemporary and Tamron 17-70mm f/2.8 Di III-A VC RXD fit the same camera?
Yes — both are Sony E mount lenses, so they fit Sony a7/a9/a1 (full-frame) and a6000-series (APS-C).
More Sony E comparisons: Sony FE 50mm f/1.4 GM vs Sigma 50mm f/1.4 DG DN Art · Sony FE 40mm f/2.5 G vs Sony FE 50mm f/2.5 G · Sony E 15mm f/1.4 G vs Sigma 16mm f/1.4 DC DN Contemporary · Sony FE 20-70mm f/4 G vs Tamron 20-40mm f/2.8 Di III VXD · all Sony E lenses · all comparisons