Canon RF 24-240mm f/4-6.3 IS USM vs Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD

Both are Canon RF mount zooms for travel and everyday — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Canon RF mount · prices change — check the retailer

Spec	Canon RF 24-240mm f/4-6.3 IS USM	Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD
Focal length	24-240mm	18-300mm
Max aperture	f/4-6.3	f/3.5-6.3
Type	zoom	zoom
Coverage	full-frame	APS-C
Mount	Canon RF	Canon RF

Which should you buy?

the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD opens wider (f/3.5-6.3) — brighter in low light and more background blur
the Canon RF 24-240mm f/4-6.3 IS USM covers 24-240mm and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD covers 18-300mm — pick the range that matches what you shoot
the Canon RF 24-240mm f/4-6.3 IS USM covers full-frame (also works on APS-C bodies); the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is APS-C-only — it won't fill a full-frame sensor
the Canon RF 24-240mm f/4-6.3 IS USM is first-party (Canon) for guaranteed full autofocus and in-camera corrections; the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is third-party — usually the value pick

Where to buy

Canon RF 24-240mm F4-6.3 is USM Lens (RF)

Check the Canon RF 24-240mm f/4-6.3 IS USM price on Amazon →

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Check the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD price on Amazon → We could not find this one on Amazon US in Canon RF — this button runs an Amazon search for it rather than opening a product page.

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FAQ

What's the difference between the Canon RF 24-240mm f/4-6.3 IS USM and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD?
The Canon RF 24-240mm f/4-6.3 IS USM is 24-240mm f/4-6.3 zoom, full-frame; the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is 18-300mm f/3.5-6.3 zoom, APS-C. Both fit the Canon RF mount.

Which is better in low light, the Canon RF 24-240mm f/4-6.3 IS USM or the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD?
The Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD — its f/3.5-6.3 maximum aperture lets in more light and gives more background blur than the f/4-6.3 of the other.

Do the Canon RF 24-240mm f/4-6.3 IS USM and Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD fit the same camera?
Yes — both are Canon RF mount lenses, so they fit Canon EOS R series (full-frame R5/R6/R8) and APS-C (R7/R10/R50). Note the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is APS-C-only and won't fill a full-frame sensor.

Citing these specs? Go ahead — manufacturer data, last verified 2026-09-01. Copy a ready-made reference:

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