Sigma APO 120-300mm f/2.8 D EX HSM IF is a versatile telephoto zoom lens with a large fixed aperture of f/2.8 capable of handling any lighting scenario. The Sigma APO 120-300mm f/2.8 D EX HSM IF is suitable for various photographic styles including weddings, events, portrait, landscape and macro. The internal focusing lens has FLD and SLD glass elements ensuring maximum correction of chromactic aberrations. It's Hyper Sonic Motor delivers precise, fast and quiet autofocusing. This lens employs 18 elements in 16 groups, nine blade diaphragm, 1.5m close focusing distance and 105mm filter thread.