Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) vs Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061)
Both are Nikon Z mount zooms for telephoto and travel — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) | Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) |
|---|---|---|
| Focal length | 70-300mm | 18-300mm |
| Max aperture | f/4.5-6.3 | f/3.5-6.3 |
| Type | zoom | zoom |
| Coverage | full-frame | APS-C |
| Mount | Nikon Z | Nikon Z |
Which should you buy?
- the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) opens wider (f/3.5-6.3) — brighter in low light and more background blur
- the Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) covers 70-300mm and the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) covers 18-300mm — pick the range that matches what you shoot
- the Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) covers full-frame (also works on APS-C bodies); the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) is APS-C-only — it won't fill a full-frame sensor
Where to buy
Tamron 70-300mm F/4.5-6.3 Di III RXD (A047)See price on Amazon
Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061)See price on Amazon
FAQ
What's the difference between the Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) and the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061)?
The Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) is 70-300mm f/4.5-6.3 zoom, full-frame; the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) is 18-300mm f/3.5-6.3 zoom, APS-C. Both fit the Nikon Z mount.
Which is better in low light, the Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) or the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061)?
The Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) — its f/3.5-6.3 maximum aperture lets in more light and gives more background blur than the f/4.5-6.3 of the other.
Do the Tamron 70-300mm F/4.5-6.3 Di III RXD (A047) and Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) 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 18-300mm F/3.5-6.3 Di III-A VC VXD (B061) is APS-C-only and won't fill a full-frame sensor.
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