Sigma 18-200mm f/3.5-6.3 DC Auto Focus OS (Optical Stabilizer) Zoom Lens for Canon Digital SLR Cameras 18-200mm focal length 27-300mm equivalent focal length on APS-C cameras, 28.8-320mm equivalent focal length on Canon APS-C cameras F3.5-6.3 maximum aperture; F22-40 minimum Micromotor-type AF motor without full-time manual focusing Image stabilization, Auto panning detection 72mm filters 0.45m/17.72" minimum focus Available in Canon EF, Nikon F (DX), Sigma SA mounts 18-200mm high-zoom-ratio lens designed for Canon digital SLR cameras 2 Special Low Dispersion (SLD) glass elements and 2 hybrid aspherical lenses Lens coating reduces flare and ghost; 17.7-inch close focusing distance Inner focusing system is suitable for circular polarizing filters and lens hoods Measures 2.75 inches in diameter and 3.07 inches long; 1-year warranty