Compare lenses

Sigma 40mm f/1.4 DG HSM Art vs TTArtisan AF 40mm f/2

The Sigma 40mm f/1.4 DG HSM Art and the TTArtisan AF 40mm f/2 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 a brighter f/1.4 (1.0 stops more light), for dim light and softer backgrounds and a fit on more cameras (105 against 82 in this guide). On these specs the TTArtisan AF 40mm f/2 has no clear advantage: choose it if the price, the handling or a lens you own decides it.

Still torn? Ask the guide about the Sigma 40mm f/1.4 DG HSM Art and the TTArtisan AF 40mm f/2

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	TTArtisan AF 40mm f/2
Maker	Sigma	TTArtisan
Focal length	40mm (prime)	40mm (prime)
Full-frame equivalent	40mm	40mm
Maximum aperture	f/1.4brighter	f/2
Made for	Full frame	Full frame
Mounts	Canon EF, Nikon F, Sony E, L-Mount	Sony E, Nikon Z, L-Mount
Stabilised	no	no
Autofocus	yes	yes
Cameras it fits	105 in this guidefits more cameras	82 in this guide

Focal range, in full-frame terms

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

TTArtisan AF 40mm f/2: 40mm.

Aperture

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

TTArtisan AF 40mm f/2: f/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

66 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 TTArtisan AF 40mm f/2 82.