{Description}FLD ("F" Low Dispersion) glass elements
Sigma's own unique OS (Optical Stabilizer) technology
Covering a wide range of focal lengths from 17mm
Super Multi-Layer Coating
Compact construction
Superior peripheral brightness
Fast and quiet AF Hyper Sonic Motor
Close focusing capability

{Specification}
Lens Construction 17 Elements in 13 Groups
Angle of View 76.5º-5.4º
Number of Diaphragm Blades 7
Mininum Aperture f22
Minimum Focusing Distance 39 cm / 15.3 in
Filter Size (mm) 72mm
Maximum Magnifications 1:3
Dimensions
(Diameter x Length) 79x101.5mm/ 3.1x4.0 in
Weight 585g / 20.6oz.