Compare lenses

Sigma 20mm f/2 DG Contemporary vs Viltrox AF 20mm f/2.8 Air

The Sigma 20mm f/2 DG Contemporary and the Viltrox AF 20mm f/2.8 Air side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 20mm f/2 DG Contemporary if you want a brighter f/2 (1.0 stops more light), for dim light and softer backgrounds. Pick the Viltrox AF 20mm f/2.8 Air if you want a fit on more cameras (82 against 66 in this guide) and a lighter lens (157 g against 370 g).

Still torn? Ask the guide about the Sigma 20mm f/2 DG Contemporary and the Viltrox AF 20mm f/2.8 Air

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 20mm f/2 DG Contemporary	Viltrox AF 20mm f/2.8 Air
Maker	Sigma	Viltrox
Focal length	20mm (prime)	20mm (prime)
Full-frame equivalent	20mm	20mm
Maximum aperture	f/2brighter	f/2.8
Made for	Full frame	Full frame
Mounts	Sony E, L-Mount	Sony E, Nikon Z, L-Mount
Stabilised	no	no
Autofocus	yes	yes
Weight	370 g	157 glighter
Cameras it fits	66 in this guide	82 in this guidefits more cameras

Focal range, in full-frame terms

Sigma 20mm f/2 DG Contemporary: 20mm.

Viltrox AF 20mm f/2.8 Air: 20mm.

Aperture

Sigma 20mm f/2 DG Contemporary: f/2 wide open.

Viltrox AF 20mm f/2.8 Air: 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

66 cameras in this guide take both, so either works on the same body. In all, the Sigma 20mm f/2 DG Contemporary fits 66 and the Viltrox AF 20mm f/2.8 Air 82.