Tokina 11-20mm f/2.8 AT-X PRO DX SD

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Lens Specifications
Name Tokina 11-20mm f/2.8 AT-X PRO DX SD
Image Circle APS-C
Type Wide Zoom
Focal Length 11 - 20mm
APS Equivalent 1.5x: 16.5 - 30mm; 1.6x: 17.6 - 32mm
Max Aperture f/2.8
Min Aperture f/22
Diaphragm Blades 9
Lens Construction 14 elements in 12 groups, including 2 SD (Super-low Dispersion) and 3 aspheric elements
Diagonal Angle of View (Based on image circle) 104.5 to 72.7 degrees
Focus Details Internal with One-Touch Focus Clutch mechanism
Front Element Rotation No
Zoom System Rotary
Closest Focus 28cm / 11.0 in.
Magnification Ratio 0.12x / 1:8.6
Filter Size 82mm
Dimensions(Length x Diameter) 92mm x 89mm / 3.62 in. x 3.50 in.
Weight 560g / 19.8 oz.
Notes Available AF Mounts: Canon EF, Nikon F (lens has focus motor); Included Accessories: BH-821 Lens Hood
Typical Online Price US$600 (Avail. March 2015)