Compare lenses

Sigma 40mm f/1.4 DG HSM Art vs Viltrox AF 27mm f/1.2 Pro

The Sigma 40mm f/1.4 DG HSM Art and the Viltrox AF 27mm f/1.2 Pro side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 40mm f/1.4 DG HSM Art if you want coverage of full frame, so it suits the larger-sensor bodies too. Pick the Viltrox AF 27mm f/1.2 Pro if you want a brighter f/1.2 (0.4 stops more light), for dim light and softer backgrounds and a design for APS-C, which usually means smaller and lighter.

Still torn? Ask the guide about the Sigma 40mm f/1.4 DG HSM Art and the Viltrox AF 27mm f/1.2 Pro

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 40mm f/1.4 DG HSM Art	Viltrox AF 27mm f/1.2 Pro
Maker	Sigma	Viltrox
Focal length	40mm (prime)	27mm (prime)
Full-frame equivalent	40mm	40mm on APS-C
Maximum aperture	f/1.4	f/1.2brighter
Made for	Full frame	APS-C
Mounts	Canon EF, Nikon F, Sony E, L-Mount	Fujifilm X, Sony E, Nikon Z
Stabilised	no	no
Autofocus	yes	yes
Weight	not listed	565 g
Cameras it fits	105 in this guide	88 in this guide

Focal range, in full-frame terms

Sigma 40mm f/1.4 DG HSM Art: 40mm.

Viltrox AF 27mm f/1.2 Pro: 27mm on APS-C, like 40mm.

Aperture

Sigma 40mm f/1.4 DG HSM Art: f/1.4 wide open.

Viltrox AF 27mm f/1.2 Pro: f/1.2 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 40mm f/1.4 DG HSM Art fits 105 and the Viltrox AF 27mm f/1.2 Pro 88.