Comparison of Canon EF 24-70mm f/2.8L USM and Tokina 24-70mm f/2.8 AT-X PRO FX SD

Attribute	Tokina 24-70mm f/2.8 AT-X PRO FX SD ×	Canon EF 24-70mm f/2.8L USM ×
Filter Size (mm)	82	77
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Closest Focus (m)	0.38	0.38
Magnification Ratio (x)	0.21	0.16
Type	Standard Zoom	Standard Zoom
Focus Details	SDM; Internal with Focus Clutch mechanism	Full-time manual focus and USM
APS Equivalent	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm	38 - 112mm
Diameter (mm)	89.6	83.2
Image Circle	35mm	35mm
Focal Length (mm)	24.00 - 70.00	24.00 - 70.00
Brand	Tokina	Canon
Name	Tokina 24-70mm f/2.8 AT-X PRO FX SD	Canon EF 24-70mm f/2.8L USM
Weight (g)	1010	950
Diagonal Angle of View (degree)	34.49 - 84.20	29.00 - 74.00
Diaphragm Blades	9	8
Zoom System	Rotary	Rotary
Length (mm)	107.5	123.5
Notes	Available AF Mounts: Canon EF, Nikon F	-
Lens Construction	15 elements in 11 groups, including 3 all-glass molded aspherical and 3 super low dispersion (SD) glass elements	16 elements in 13 groups, including 3 asperical elements and 1 UD element