Tamron Auto Focus 70-200mm f/2.8 Di LD IF Macro Lens Canon Digital SLR Cameras (Model A001E) (International Model) No Warranty 70-200mm focal length 105-300mm equivalent focal length on APS-C cameras, 112-320mm equivalent focal length on Canon APS-C cameras F2.8 constant maximum aperture; F32 minimum Micromotor-type AF motor without full-time manual focusing Available in Canon EF, Pentax KAF, Sony Alpha, Nikon F (FX) mounts