Compare lenses

Sigma 50-120mm f/2.8 DC OS Contemporary vs Tamron 70-180mm f/2.8 Di III VC VXD G2

The Sigma 50-120mm f/2.8 DC OS Contemporary and the Tamron 70-180mm f/2.8 Di III VC VXD G2 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 a design for APS-C, which usually means smaller and lighter; a fit on more cameras (90 against 57 in this guide); and a lighter lens (390 g against 855 g). Pick the Tamron 70-180mm f/2.8 Di III VC VXD G2 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 VC VXD G2

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 VC VXD G2
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, Nikon Z
Stabilised	yes	yes
Autofocus	yes	yes
Zoom range	2.4×	2.6×
Weight	390 glighter	855 g
Cameras it fits	90 in this guidefits more cameras	57 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 VC VXD G2: 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 VC VXD G2: 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 VC VXD G2 57.