Compare lenses

Sigma 10-18mm f/2.8 DC DN Contemporary vs Tamron 11-20mm f/2.8 Di III-A RXD

The Sigma 10-18mm f/2.8 DC DN Contemporary and the Tamron 11-20mm f/2.8 Di III-A RXD side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 10-18mm f/2.8 DC DN Contemporary if you want a fit on more cameras (115 against 90 in this guide) and a lighter lens (255 g against 335 g). On these specs the Tamron 11-20mm f/2.8 Di III-A RXD has no clear advantage: choose it if the price, the handling or a lens you own decides it.

Still torn? Ask the guide about the Sigma 10-18mm f/2.8 DC DN Contemporary and the Tamron 11-20mm f/2.8 Di III-A 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	Sigma 10-18mm f/2.8 DC DN Contemporary	Tamron 11-20mm f/2.8 Di III-A RXD
Maker	Sigma	Tamron
Focal length	10-18mm (zoom)	11-20mm (zoom)
Full-frame equivalent	15-27mm on APS-C	16-30mm on APS-C
Maximum aperture	f/2.8	f/2.8
Made for	APS-C	APS-C
Mounts	Sony E, Fujifilm X, L-Mount, Canon RF	Sony E, Fujifilm X, Canon RF
Stabilised	no	no
Autofocus	yes	yes
Zoom range	1.8×	1.8×
Weight	255 glighter	335 g
Cameras it fits	115 in this guidefits more cameras	90 in this guide

Focal range, in full-frame terms

Sigma 10-18mm f/2.8 DC DN Contemporary: 10-18mm on APS-C, like 15-27mm.

Tamron 11-20mm f/2.8 Di III-A RXD: 11-20mm on APS-C, like 16-30mm.

Aperture

Sigma 10-18mm f/2.8 DC DN Contemporary: f/2.8 wide open.

Tamron 11-20mm f/2.8 Di III-A 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

90 cameras in this guide take both, so either works on the same body. In all, the Sigma 10-18mm f/2.8 DC DN Contemporary fits 115 and the Tamron 11-20mm f/2.8 Di III-A RXD 90.