Compare lenses

Sigma 20-200mm f/3.5-6.3 DG Contemporary vs Tamron 28-200mm f/2.8-5.6 Di III RXD

The Sigma 20-200mm f/3.5-6.3 DG Contemporary and the Tamron 28-200mm f/2.8-5.6 Di III RXD side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 20-200mm f/3.5-6.3 DG Contemporary if you want a wider view (from 20mm equivalent) and a fit on more cameras (66 against 41 in this guide). Pick the Tamron 28-200mm f/2.8-5.6 Di III RXD if you want a brighter f/2.8 (0.6 stops more light), for dim light and softer backgrounds.

Still torn? Ask the guide about the Sigma 20-200mm f/3.5-6.3 DG Contemporary and the Tamron 28-200mm f/2.8-5.6 Di III 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 20-200mm f/3.5-6.3 DG Contemporary	Tamron 28-200mm f/2.8-5.6 Di III RXD
Maker	Sigma	Tamron
Focal length	20-200mm (zoom)	28-200mm (zoom)
Full-frame equivalent	20-200mm	28-200mm
Maximum aperture	f/3.5-6.3	f/2.8-5.6brighter
Made for	Full frame	Full frame
Mounts	Sony E, L-Mount	Sony E
Stabilised	no	no
Autofocus	yes	yes
Zoom range	10.0×more range	7.1×
Weight	540 glighter	575 g
Cameras it fits	66 in this guidefits more cameras	41 in this guide

Focal range, in full-frame terms

Sigma 20-200mm f/3.5-6.3 DG Contemporary: 20-200mm.

Tamron 28-200mm f/2.8-5.6 Di III RXD: 28-200mm.

Aperture

Sigma 20-200mm f/3.5-6.3 DG Contemporary: f/3.5 wide open.

Tamron 28-200mm f/2.8-5.6 Di III 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

41 cameras in this guide take both, so either works on the same body. In all, the Sigma 20-200mm f/3.5-6.3 DG Contemporary fits 66 and the Tamron 28-200mm f/2.8-5.6 Di III RXD 41.