Comparison of Sigma 20mm f/1.8 EX DG Aspherical RF and Sony FE 24mm f/1.4 GM SEL24F14GM

Attribute	Sigma 20mm f/1.8 EX DG Aspherical RF ×	Sony FE 24mm f/1.4 GM SEL24F14GM ×
Filter Size (mm)	82	67
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	Dust and moisture resistant; Included Accessories: ALC-SH15 Hood, Caps and Case.
Closest Focus (m)	0.2	0.24
Magnification Ratio (x)	0.25	0.17
Type	Wide Prime	Wide Prime
Focus Details	Internal (Rear Focus) with Dual Focus mechanism	Internal with DDSSM (Direct Drive Supersonic Motor); AF/MF switch; customizable focus hold button
APS Equivalent	1.5x: 30mm; 1.6x: 32mm	36mm
Diameter (mm)	88.6	75.4
Image Circle	35mm	35mm (Full-frame E-Mount)
Focal Length (mm)	20.00	24.00
Brand	Sigma	Sony
Name	Sigma 20mm f/1.8 EX DG Aspherical RF	Sony FE 24mm f/1.4 GM SEL24F14GM
Weight (g)	520	445
Aperture (f)	1.80 - 22.00	1.40 - 16.00
Diaphragm Blades	9	11
Diagonal Angle of View (degree)	94.50	84.00
Length (mm)	89.5	92.4
Diaphragm Blades Type	-	rounded
Lens Construction	13 elements in 11 groups, including 2 aspherical elements	13 elements in 10 groups, including 3 ED (Extra-low Dispersion) and 2 XA (eXtreme Aspherical) elements; Nano AR Coating