Fujifilm MCEX-11 Macro Extension Tube allows focusing on subjects much closer to the camera. This X-Mount Extension Tube is inserted between the lens and the camera body and increases the distance between the lens elements and the sensor. Electronic connections automatically pass information between Fuji X-Mount lenses and X-series camera bodies so you can still use autofocus and control the aperture while using the tubes. The moutn rings aer made from high-grade solid metal and are manufactured to suit the XF lenses and X-series cameras perfectly.