The 24-70mm constant f/2.8 zoom and parfocal design, backed by 17 elements with 2 aspherical and 3 ED lenses, deliver sharp, consistent exposure across the range. A linear STM motor provides quiet, precise autofocus, while weather sealing and a 9-blade diaphragm enable rugged use and smooth, circular bokeh. This lens suits video shooters and hybrid creators on Sony E-mount who need reliable parfocal zoom for smooth focus transitions during filming.