Compare lenses

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

The Sigma 20mm f/1.4 DG DN 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 DN Art if you want autofocus. Pick the Voigtländer Nokton 21mm f/1.4 Aspherical if you want a lighter lens (560 g against 630 g).

Still torn? Ask the guide about the Sigma 20mm f/1.4 DG DN 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 DN 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	Sony E, L-Mount	Sony E, Leica M
Stabilised	no	no
Autofocus	yesautofocus	no, manual focus
Weight	630 g	560 glighter
Cameras it fits	66 in this guide	61 in this guide

Focal range, in full-frame terms

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

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

Aperture

Sigma 20mm f/1.4 DG DN 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 DN Art fits 66 and the Voigtländer Nokton 21mm f/1.4 Aspherical 61.