Comparison of Laowa 12mm f/2.8 Zero-D and Sigma 20mm f/1.8 EX DG Aspherical RF

Attribute	Sigma 20mm f/1.8 EX DG Aspherical RF ×	Laowa 12mm f/2.8 Zero-D ×
Aperture (f)	1.80 - 22.00	2.80 - 22.00
Filter Size (mm)	82	100
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	Built-in Petal-Shape Lens Hood; Available Mounts: Canon EF, Canon RF, Nikon F, Nikon Z, Pentax K, Sony A, Sony E
Closest Focus (m)	0.2	0.18
Magnification Ratio (x)	0.25	0.2
Type	Wide Prime	Wide Prime
Focus Details	Internal (Rear Focus) with Dual Focus mechanism	Internal manual focus only
APS Equivalent	1.5x: 30mm; 1.6x: 32mm	1.5x: 18mm; 1.6x: 19.2mm
Diaphragm Blades	9	7
Image Circle	35mm	35mm
Focal Length (mm)	20.00	12.00
Brand	Sigma	Laowa
Name	Sigma 20mm f/1.8 EX DG Aspherical RF	Laowa 12mm f/2.8 Zero-D
Weight (g)	520	609
Diagonal Angle of View (degree)	94.50	121.96
Length (mm)	89.5	82.8
Diameter (mm)	88.6	74.8
Lens Construction	13 elements in 11 groups, including 2 aspherical elements	16 elements in 10 groups, including 2 aspherical and 3 ED elements; FEC coating