TypeWide-angle zoom lens
Special FunctionsWide angle, zoom
Intended ForDigital SLR
Focal Length18 mm - 35 mm
Lens ApertureF/1.8
Minimum ApertureF/16
Optical Zoom2 x
Magnification1 / 4.3
Min Focus Distance11 in
Focus AdjustmentAutomatic, manual
Zoom AdjustmentManual
Max View Angle76.5 degrees
Min View Angle44.2 degrees
Lens Construction12 group(s) / 17 element(s)
Filter Size72 mm
Diaphragm Blades9
Lens CoatingSuper Multi-Layer Coating
Mounting TypeCanon EF-S
FeaturesInternal focusing system, full-time manual focusing, Hyper Sonic Motor (HSM), aspherical lens, SLD (Special Low Dispersion) glass, Sigma USB dock compatible