Sigma 8-16mm f4.5-5.6 DC HSM Art (Nikon mount) Lens Lowepro Backpacks Assisting with operation of the

Assisting with operation of the lens is a pulse stepping motor AF system

and highly accurate autofocus performance across the entire sensor area using 651 automatic AF points

Front thread allows for additional accessories

The Lowepro Flipside Trek BP 350 AW Backpack is equipped with the Active Zone carrier system

Sigma 8-16mm f4.5-5.6 DC HSM Art (Nikon mount) Lens Lowepro Backpacks Assisting with operation of theHighlights: Lens Construction: 15 Elements in 11 Groups Filter size 75mm Angle of View (SD Format): 114. 5 75. 7degrees Number of Diaphragm Blades: 7 Blades Minimum Aperture: F22 Minimum Focusing Distance: 24cm Maximum Magnification: 1: 7. 8 Filter Size: 72mm Dimensions: Diameter 75mm X Length 105. 7mm Weight: 555g The Sigma 8 16mm F4. 5 5. 6 DC HSM is the only one of its kind. This is the first ultra wide zoom lens with a minimum focal length of 8mm,