Compare lenses

Canon RF 24-105mm f/4L IS USM vs Tamron 17-70mm f/2.8 Di III-A VC RXD

The Canon RF 24-105mm f/4L IS USM and the Tamron 17-70mm f/2.8 Di III-A VC RXD side by side, computed from this guide's catalogue.

Which to pick

Pick the Canon RF 24-105mm f/4L IS USM if you want coverage of full frame, so it suits the larger-sensor bodies too. Pick the Tamron 17-70mm f/2.8 Di III-A VC RXD if you want a brighter f/2.8 (1.0 stops more light), for dim light and softer backgrounds; a design for APS-C, which usually means smaller and lighter; a fit on more cameras (106 against 18 in this guide); and a lighter lens (525 g against 700 g).

Still torn? Ask the guide about the Canon RF 24-105mm f/4L IS USM and the Tamron 17-70mm f/2.8 Di III-A VC RXD

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	Canon RF 24-105mm f/4L IS USM	Tamron 17-70mm f/2.8 Di III-A VC RXD
Maker	Canon	Tamron
Focal length	24-105mm (zoom)	17-70mm (zoom)
Full-frame equivalent	24-105mm	26-105mm on APS-C
Maximum aperture	f/4	f/2.8brighter
Made for	Full frame	APS-C
Mounts	Canon RF	Sony E, Fujifilm X, Nikon Z, Canon RF
Stabilised	yes	yes
Autofocus	yes	yes
Zoom range	4.4×	4.1×
Weight	700 g	525 glighter
Cameras it fits	18 in this guide	106 in this guidefits more cameras

Focal range, in full-frame terms

Canon RF 24-105mm f/4L IS USM: 24-105mm.

Tamron 17-70mm f/2.8 Di III-A VC RXD: 17-70mm on APS-C, like 26-105mm.

Aperture

Canon RF 24-105mm f/4L IS USM: f/4 wide open.

Tamron 17-70mm f/2.8 Di III-A VC RXD: f/2.8 wide open.

Each opening drawn to scale against f/1.4: a smaller f-number lets in more light and blurs the background more.

Field of view

How wide each sees, at each end, on the sensor it was made for.

Cameras they fit

18 cameras in this guide take both, so either works on the same body. In all, the Canon RF 24-105mm f/4L IS USM fits 18 and the Tamron 17-70mm f/2.8 Di III-A VC RXD 106.