Comparison of Canon EF 8-15mm ƒ/4L USM Fisheye and Tokina 10-17mm f/3.5-4.5 AT-X 107 AF DX Fisheye

Attribute	Canon EF 8-15mm ƒ/4L USM Fisheye ×	Tokina 10-17mm f/3.5-4.5 AT-X 107 AF DX Fisheye ×
Diagonal Angle of View (degree)	175.50 - 180.00	100.00 - 180.00
Notes	Included Accessories: lens hood, case	Built-in Lens Hood; Available AF Mounts: Canon and Nikon Digital Only
Aperture (f)	4.00 - 22.00	4.00 - 22.00
Closest Focus (m)	0.16	0.14
Magnification Ratio (x)	0.39	0.391
Type	Wide Zoom Fisheye	Wide Zoom
Focus Details	Inner focusing; Ultra-sonic Motor (USM) with AF/MF switch	Internal
APS Equivalent	13 - 24mm	1.5x: 15 - 25.5mm; 1.6x: 16 - 27.2mm
Diaphragm Blades	7	6
Image Circle	35mm	APS-C
Focal Length (mm)	8.00 - 15.00	10.00 - 17.00
Brand	Canon	Tokina
Name	Canon EF 8-15mm ƒ/4L USM Fisheye	Tokina 10-17mm f/3.5-4.5 AT-X 107 AF DX Fisheye
Weight (g)	540	350
Zoom System	Rotary	Rotary
Length (mm)	83	71.1
Diameter (mm)	78.5	70
Lens Construction	14 elements in 11 groups, including UD and aspherical elements	10 elements in 8 groups, including one SD glass element