Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) vs Tamron 20-40mm F/2.8 Di III VXD (A062)
Both are Nikon Z mount zooms for everyday and travel — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) | Tamron 20-40mm F/2.8 Di III VXD (A062) |
|---|---|---|
| Focal length | 17-70mm | 20-40mm |
| Max aperture | f/2.8 | f/2.8 |
| Type | zoom | zoom |
| Coverage | APS-C | full-frame |
| Mount | Nikon Z | Nikon Z |
Which should you buy?
- the Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) covers 17-70mm and the Tamron 20-40mm F/2.8 Di III VXD (A062) covers 20-40mm — pick the range that matches what you shoot
- the Tamron 20-40mm F/2.8 Di III VXD (A062) covers full-frame (also works on APS-C bodies); the Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) is APS-C-only — it won't fill a full-frame sensor
Where to buy
Tamron 17-70mm F/2.8 Di III-A VC RXD (B070)See price on Amazon
Tamron 20-40mm F/2.8 Di III VXD (A062)See price on Amazon
FAQ
What's the difference between the Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) and the Tamron 20-40mm F/2.8 Di III VXD (A062)?
The Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) is 17-70mm f/2.8 zoom, APS-C; the Tamron 20-40mm F/2.8 Di III VXD (A062) is 20-40mm f/2.8 zoom, full-frame. Both fit the Nikon Z mount.
Do the Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) and Tamron 20-40mm F/2.8 Di III VXD (A062) fit the same camera?
Yes — both are Nikon Z mount lenses, so they fit Nikon Z series (Z6/Z7/Z8/Z9 full-frame, Z50/Zfc APS-C). Note the Tamron 17-70mm F/2.8 Di III-A VC RXD (B070) is APS-C-only and won't fill a full-frame sensor.
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