Sigma 18-250mm f3.5-6.3 DC MACRO HSM Lens with UV, CPL, FLD, ND4 and +10 Macro Filters for Sony Alpha A77, A65, A58, A57, A55, A37, A35, A33, A900, A700, A580, A560, A550, A390, A380, A330 and A290 Digital SLR Cameras 18-250mm focal length, only compatible with APS-C DSLRs (see title) 27-375mm equivalent focal length on APS-C cameras, 28.8-400mm equivalent focal length on APS-C cameras HSM (Hyper-Sonic Motor) ensures a quiet and high-speed auto focus Micromotor-type AF motor with full-time manual focusing Image stabilization, Up to 4 stops