Fujifilm MCEX-18G WR Macro Extension TubeFujifilm MCEX 18G WR Macro Extension Tube The Fujifuilm MCEX 18G WR and MCEX 45G WR macro extension tubes, further expand the range of creative opportunities available to GFX system camera owners, these macro extension tubes can be connected to any GF lens and give photographers the chance to capture images of a world that isnt usually visible to the naked eye. With 18mm and 45mm versions available, these macro extension tubes are weather resistant