Tokina 12-28mm f/4 AT-X 128 AF PRO DX SD

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Lens Specifications
Name Tokina 12-28mm f/4 AT-X 128 AF PRO DX
Image Circle APS-C
Type Wide Zoom
Focal Length 12 - 28mm
APS Equivalent 1.5x: 18 - 42mm;1.6x: 19.2 - 44.8mm
Max Aperture f/4
Min Aperture f/22
Diaphragm Blades 9
Lens Construction 14 elements in 12 groups, including 2 aspherical and 2 SD elements
Diagonal Angle of View (Based on image circle) 99.4 to 54.7 degrees
Focus Details Internal with One-Touch Focus Clutch mechanism; SD-M (Silent Drive-Module)
Front Element Rotation No
Zoom System Rotary
Closest Focus 25cm / 9.8 in.
Magnification Ratio 0.2x / 1:4.94
Filter Size 77mm
Dimensions(Length x Diameter) 90.2mm x 84mm / 3.6 in. x 3.3 in.
Weight 530g / 18.7 oz.
Notes Available AF Mounts: Canon and Nikon Digital Only. Built-in AF motor for use with all Nikon DSLRs. Included Accessories: Lens Hood
Typical Online Price US$TBD (Availability: April 2013 for Nikon mount, June 2013 for Canon mount.)