Compare lenses

Sigma 20mm f/1.4 DG HSM Art vs Voigtländer Nokton 21mm f/1.4 Aspherical

The Sigma 20mm f/1.4 DG HSM Art and the Voigtländer Nokton 21mm f/1.4 Aspherical side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 20mm f/1.4 DG HSM Art if you want autofocus and a fit on more cameras (105 against 61 in this guide). On these specs the Voigtländer Nokton 21mm f/1.4 Aspherical 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 20mm f/1.4 DG HSM Art and the Voigtländer Nokton 21mm f/1.4 Aspherical

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/1.4 DG HSM Art	Voigtländer Nokton 21mm f/1.4 Aspherical
Maker	Sigma	Voigtländer
Focal length	20mm (prime)	21mm (prime)
Full-frame equivalent	20mm	21mm
Maximum aperture	f/1.4	f/1.4
Made for	Full frame	Full frame
Mounts	Canon EF, Nikon F, Sony E, L-Mount	Sony E, Leica M
Stabilised	no	no
Autofocus	yesautofocus	no, manual focus
Weight	not listed	560 g
Cameras it fits	105 in this guidefits more cameras	61 in this guide

Focal range, in full-frame terms

Sigma 20mm f/1.4 DG HSM Art: 20mm.

Voigtländer Nokton 21mm f/1.4 Aspherical: 21mm.

Aperture

Sigma 20mm f/1.4 DG HSM Art: f/1.4 wide open.

Voigtländer Nokton 21mm f/1.4 Aspherical: f/1.4 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 20mm f/1.4 DG HSM Art fits 105 and the Voigtländer Nokton 21mm f/1.4 Aspherical 61.