Comparison of Canon EF 300mm ƒ/2.8L IS II USM and Tokina 300mm f/2.8 AT-X 300 AF PRO

Attribute	Canon EF 300mm ƒ/2.8L IS II USM ×	Tokina 300mm f/2.8 AT-X 300 AF PRO ×
Magnification Ratio (x)	0.18	-
Filter Size (mm)	52	112
Focus Details	Inner focusing; Ultra-sonic Motor (USM), AF/PF/MF switch, Focus Preset, Range Limiter	Internal
Closest Focus (m)	2	2.4
Lens Construction	16 elements in 12 groups, including 2 fluorite elements	9 elements in 7 groups, including 2 SD elements
Length (mm)	248	187
Focal Length (mm)	300.00	300.00
Diaphragm Blades Type	rounded	-
Brand	Canon	Tokina
Image Circle	35mm	35mm
Name	Canon EF 300mm ƒ/2.8L IS II USM	Tokina 300mm f/2.8 AT-X 300 AF PRO
Weight (g)	2400	2300
Type	Telephoto Prime	Telephoto Prime
Notes	Image Stabilization (4-stops); Included Accessories: lens hood and case	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Fitted Soft Case
APS Equivalent	480mm	1.5x: 450mm; 1.6x: 480mm
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	8.30	8.20
Diameter (mm)	128	117