Fujifilm MCEX-18G WR Macro Extension TubeThe Fujifilm WR MCEX 18G Macro Extension Tube gives you a powerful magnification boost for your Fujifilm GFX 50S and GF lenses. This Macro Extension Tube is 18mm long to enable macro like performance for your average focal length lens. Consistent Quality This extension tube contains no optical components, which means the image retains the quality of the original lens while simply providing a boost in magnification. Lens and camera autofocus features