Comparison of Canon EF 16-35mm f/2.8L USM and Tokina 12-24mm f/4 AT-X 124 AF PRO DX II

Attribute	Canon EF 16-35mm f/2.8L USM ×	Tokina 12-24mm f/4 AT-X 124 AF PRO DX II ×
Filter Size (mm)	77	77
Notes	Includes Hood EW-83E, Lens Case LP 1319	Available AF Mounts: Canon and Nikon Digital Only. Built-in AF motor for use with all Nikon DSLRs including Nikon D40, D40x, D60. Included Accessorie
Closest Focus (m)	0.28	0.3
Magnification Ratio (x)	0.22	0.125
Type	Wide Zoom	Wide Zoom
Length (mm)	103	89.5
APS Equivalent	26 - 56mm	1.5x: 18-36mm;1.6x: 19.2-38.4mm
Zoom System	Rotary	Rotary
Image Circle	35mm	APS-C
Focal Length (mm)	16.00 - 35.00	12.00 - 24.00
Brand	Canon	Tokina
Name	Canon EF 16-35mm f/2.8L USM	Tokina 12-24mm f/4 AT-X 124 AF PRO DX II
Weight (g)	600	540
Aperture (f)	2.80 - 22.00	4.00 - 22.00
Diaphragm Blades	7	9
Diagonal Angle of View (degree)	63.00 - 108.20	61.00 - 99.00
Lens Construction	13 elements in 10 groups, including 3 aspherical and 2 UD elements	13 elements in 11 groups, including 2 aspherical elements
Diameter (mm)	83.5	84
Focus Details	Inner focusing; full-time manual focus and USM;	Internal with One-Touch Focus Clutch mechanism; DC AF motor