Macro Lens Extension Tube DG-GFX 18mm Auto-Focus Extender Tube Adapter Ring for Fuji G-Mount Medium Format Lens and G-Mount Camera Fujifilm GFX 50S / 50R

It works pretty well. Not as much range of focus as I was expecting. I would go for the bigger size if you really want to do macro shots, this extension tube just gets you a lot closer. The auto focus is a little slower with it on the camera. Good value compared to the fujifilm one.

This Viltrox extension tube earned a place in my camera bag after three days of using it to photograph close-ups of flowers. My 50R functioned normally with it on and I didn't noticed any negative quality -- mechanical or image -- effects. It adds a needed close-focusing capability to my Fuji GF 45-100 and 100-200 lenses.

Easy to use and, since there is no glass (optics) there is nothing to degr