These premium interchangeable lenses use the X-mount standard exclusive to X-series digital cameras. The two models cover a range from 16 to 140 mm and feature a constant F2.8 aperture. Moreover, they suppress optical aberrations to realise sharpness across the entire zoom range and beautiful bokeh effects. The aperture ring with its engraved markings and the on-body dials enable the lens to be operated intuitively.