The Sigma 60-600mm f/4.5-6.3 DG OS HSM Sports Lens is an all-rounder lens with high optical quality, that covers about everything from standard to hyper-telephoto, and also the worlds first 10x optical telephoto zoom lens with a tele end of 600mm definitely meeting the most stringent needs of a professional photographer. Taking this lens out to the wild or on sport grounds will be an absolute pleasure as you can capture subjects that are up close to you or even distant subjects, and with this comes Intelligent Optical Stabilization with the latest algorithm to deliver an image stabilization effect of 4 stops; a high-speed Autofocus, thanks to its brilliant HSM (Hyper Sonic Motor) which is perfect to capture rapid moving subjects. Other top qualities of this include three FLD (F Low Dispersion) glass elements and one SLD (Special Low Dispersion) glass element to effectively correct magnification chromatic aberration offering both high resolution and consistent edge to edge performance throughout the entire zoom range; water- and oil-repellent coating; dust-proof and splash-proof construction and a zoom lock switch thats incorporated in the lens.