Comparison of Canon EF 15mm f/2.8 Fisheye and Nikon 16mm f/2.8D AF Fisheye Nikkor

Attribute	Nikon 16mm f/2.8D AF Fisheye Nikkor ×	Canon EF 15mm f/2.8 Fisheye ×
Notes	Included Accessories: Bayonet filters: L37C, A2, B2, O56	Fixed, petal-type hood; rear gelatin filter holder
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Closest Focus (m)	0.25	0.2
Magnification Ratio (x)	0.1	0.14
Length (mm)	56	73
Focus Details	Close Range Correction (CRC); Rear Focusing	Focus Details
APS Equivalent	24mm	24mm
Type	Fisheye Prime	Fisheye Prime
Image Circle	35mm	35mm
Focal Length (mm)	16.00	15.00
Brand	Nikon	Canon
Name	Nikon 16mm f/2.8D AF Fisheye Nikkor	Canon EF 15mm f/2.8 Fisheye
Weight (g)	290	330
Diagonal Angle of View (degree)	180.00	180.00
Diaphragm Blades	7	5
Diameter (mm)	64	62
Lens Construction	8 elements in 5 groups	8 elements in 7 groups