The Tamron 17-28mm f/2.8 DI III RXD (model A046) lens is designed for Sony full-frame mirrorless cameras and achieves all of the benefits of a fast lens. It features fluorine coating, moisture-resistant construction, and a maximum aperture of F/2.8. The lens utilizes an RXD (Rapid eXtra-silent stepping Drive) for quiet autofocus. Minimum Focus Distance is 19cm at 17mm and 26cm at 28mm. It weighs 420g and has a filter size of 67mm. This lens is compatible with Sony FE full frame cameras and comes with a 5-year guarantee upon registration. Its high F/2.8 light intensity creates attractive backgrounds. The lens is comfortable, lightweight (420G), and compact (99mm). The new quiet RXD AF stepper motor is ideal for video recording. It is compatible with the camera's built-in functions and features a splash-proof housing construction.