The 28-200mm f/2.8-5.6 Di III RXD from Tamron is a wide-to-super-tele zoom distinguished by its bright f/2.8 maximum aperture at the wide end of the zoom, along with its sleek and portable design. Benefitting the optical design is an RXD stepping motor, which enables quick, near-silent autofocus performance to suit stills and video, along with a full-time manual focus override and a minimum focusing distance of 7.5". All-in-one zoom is designed for full-frame Sony E-mount mirrorless cameras, however, can also be used with APS-C models where it will provide a 42-300mm equivalent focal length range.RXD (Rapid eXtra-silent stepping Drive) autofocus motor delivers impressively quiet, quick, and smooth focusing performance to suit both stills and video applications. This focusing system also offers a minimum focusing distance of just 7.5" and a 1:3.1 maximum magnification for working with close-up subjects. Full-time manual focus override is also possible, and it is compatible with Sony's Direct Manual Focus function or fine-tuned manual control. The rounded seven-blade diaphragm contributes to a pleasing bokeh quality.