Comparison of Nikon 14mm f/2.8D ED AF Nikkor and Sigma 14mm f/2.8 EX Aspherical HSM

Attribute	Nikon 14mm f/2.8D ED AF Nikkor ×	Sigma 14mm f/2.8 EX Aspherical HSM ×
Notes	Included Accessories: Soft case. Lens Hood: Built-in Flower type	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Closest Focus (m)	0.2	0.18
Magnification Ratio (x)	0.15	0.2
Length (mm)	84	91
Focus Details	Rear Focusing	Internal focus; HSM with full-time manual override
APS Equivalent	21mm	1.5x: 21mm; 1.6x: 22.4mm
Type	Wide Prime	Wide Prime
Image Circle	35mm	35mm
Focal Length (mm)	14.00	14.00
Brand	Nikon	Sigma
Name	Nikon 14mm f/2.8D ED AF Nikkor	Sigma 14mm f/2.8 EX Aspherical HSM
Weight (g)	670	630
Diagonal Angle of View (degree)	114.00	114.20
Diaphragm Blades	7	7
Diameter (mm)	86	82
Lens Construction	14 elements in 12 groups, including 1 ED and 2 aspherical elements	14 elements in 10 groups, including 2 aspherical and 2 SLD elements