FUJIFILM Macro Extension Tube MCEX-16 Two types (11mm, 16mm) will be available. You can choose from the two types of tubes depending on the level of magnification you require. Electronic connections automatically pass information between Fujinon X-Mount lenses and Fujifilm X-series camera bodies so you can still use autofocus and control the aperture while using the tubes. Designed exclusively for the XF lenses and X-series cameras. The mount rings of both tubes are made of high-grade solid metal and are precisely manufactured to suit the XF lenses and the X-series interchangeable cameras perfectly.