Comparison of Olympus 11-22mm f/2.8-3.5 Zuiko Digital and Tokina 11-20mm f/2.8 AT-X PRO DX SD

Attribute	Tokina 11-20mm f/2.8 AT-X PRO DX SD ×	Olympus 11-22mm f/2.8-3.5 Zuiko Digital ×
Notes	Available AF Mounts: Canon EF, Nikon F (lens has focus motor); Included Accessories: BH-821 Lens Hood	Includes Lens Hood (LH-75) and Lens Case (LSC-0918); Compatible with TC-14 Teleconverter
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Magnification Ratio (x)	0.12	0.13
Filter Size (mm)	82	72
Focus Details	Internal with One-Touch Focus Clutch mechanism	-
Type	Wide Zoom	Wide Zoom
Diaphragm Blades	9	7
Diameter (mm)	89	75
Image Circle	APS-C	Image Circle
Focal Length (mm)	11.00 - 20.00	11.00 - 22.00
Brand	Tokina	Olympus
Name	Tokina 11-20mm f/2.8 AT-X PRO DX SD	Olympus 11-22mm f/2.8-3.5 Zuiko Digital
Weight (g)	560	485
Diagonal Angle of View (degree)	72.70 - 104.50	53.00 - 89.00
Lens Construction	14 elements in 12 groups, including 2 SD (Super-low Dispersion) and 3 aspheric elements	12 elements in 10 groups, including 2 aspherical elements
Zoom System	Rotary	Rotary
Front Element Rotation	-	-
35mm Equivalent	-	22 - 44mm
Length (mm)	92	92.5
APS Equivalent	1.5x: 16.5 - 30mm; 1.6x: 17.6 - 32mm	-
Closest Focus (m)	0.28	0.28