Comparison of Nikon 19mm f/4E ED PC Nikkor and Sigma 20mm ƒ/1.4 DG HSM Art

Attribute	Sigma 20mm ƒ/1.4 DG HSM Art ×	Nikon 19mm f/4E ED PC Nikkor ×
Diaphragm Blades Type	rounded	rounded
Notes	Available AF Mounts: Sigma SA, Canon EF, L-Mount, Nikon F, Sony E; Compatible with Sigma's USB Dock and Mount Conversion Service	Perspective Control: Horizontal and vertical shift and tilt: Shift: +/- 12mm, Tilt: +/- 7.5 degrees
Aperture (f)	1.40 - 16.00	4.00 - 32.00
Closest Focus (m)	0.28	0.25
Magnification Ratio (x)	0.14	0.18
Type	Wide Prime	Wide Prime, Perspective Correction
Focus Details	HSM (Hypersonic Motor) with full-time manual focus override	Manual Focus
APS Equivalent	1.5x: 30mm; 1.6x: 32mm	28.5mm
Diaphragm Blades	9	9
Image Circle	35mm	35mm
Focal Length (mm)	20.00	19.00
Brand	Sigma	Nikon
Name	Sigma 20mm ƒ/1.4 DG HSM Art	Nikon 19mm f/4E ED PC Nikkor
Weight (g)	963	885
Diagonal Angle of View (degree)	94.50	97.00
Length (mm)	91.4	124
Diameter (mm)	129.5	89
Lens Construction	15 elements in 11 groups, including 1 double-sided aspherical, 2 FLD and 5 SLD elements	17 elements in 13 groups, including 2 aspherical and 3 ED elements