Focal length: 17-70mm
Maximum aperture: 2.8-4.5
Minimum Aperture: 22
Lens Construction : 15 Elements in 12 Groups
Angle of View : 72.4 - 20.2 degrees (Sigma SD format)
Number of Diaphragm Blades : 7 Blades
Minimum Focusing Distance : 20cm/7.9 in.
Maximum Magnification : 1:2.3
Filter Size : Diameter 72mm
Dimensions (D x L): 79mm x 82.5mm (3.1 in. X 3.2 in.)
Weight : 455g (16.0 oz)