Compare lenses

Sigma 50-120mm f/2.8 DC OS Contemporary vs Tamron 70-180mm f/2.8 Di III VXD

The Sigma 50-120mm f/2.8 DC OS Contemporary and the Tamron 70-180mm f/2.8 Di III VXD side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 50-120mm f/2.8 DC OS Contemporary if you want optical stabilisation, which helps most on bodies without it; a design for APS-C, which usually means smaller and lighter; a fit on more cameras (90 against 41 in this guide); and a lighter lens (390 g against 810 g). Pick the Tamron 70-180mm f/2.8 Di III VXD if you want coverage of full frame, so it suits the larger-sensor bodies too.

Still torn? Ask the guide about the Sigma 50-120mm f/2.8 DC OS Contemporary and the Tamron 70-180mm f/2.8 Di III VXD

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 50-120mm f/2.8 DC OS Contemporary	Tamron 70-180mm f/2.8 Di III VXD
Maker	Sigma	Tamron
Focal length	50-120mm (zoom)	70-180mm (zoom)
Full-frame equivalent	75-180mm on APS-C	70-180mm
Maximum aperture	f/2.8	f/2.8
Made for	APS-C	Full frame
Mounts	Sony E, Fujifilm X, Canon RF	Sony E
Stabilised	yesstabilised	no
Autofocus	yes	yes
Zoom range	2.4×	2.6×
Weight	390 glighter	810 g
Cameras it fits	90 in this guidefits more cameras	41 in this guide

Focal range, in full-frame terms

Sigma 50-120mm f/2.8 DC OS Contemporary: 50-120mm on APS-C, like 75-180mm.

Tamron 70-180mm f/2.8 Di III VXD: 70-180mm.

Aperture

Sigma 50-120mm f/2.8 DC OS Contemporary: f/2.8 wide open.

Tamron 70-180mm f/2.8 Di III VXD: 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

41 cameras in this guide take both, so either works on the same body. In all, the Sigma 50-120mm f/2.8 DC OS Contemporary fits 90 and the Tamron 70-180mm f/2.8 Di III VXD 41.