The dt 55 300mm f45 56 sam is a budget telephoto zoom designed to complement the 18 55mm 39kit39 lens it39s optimized for sony39s aps c alpha slts and dslrs and features sony39s smooth autofocus motor sam for fast quiet focussing billed as an ideal lens for capturing stills and video of distant subjects it features an ed extra low dispersion element which should reduce aberrations and increase sharpness from flattering portraits to faraway wildlife and fast action sports nearly eve