Applicable Model: Applicable for EF Mount Lens and applicable for Fuji G mount Cameras, Such As for Fuji GFX 50S, GFX 50R, GFX 100S, GFX 100. Made of Aluminum Alloy: Light and strong, oxidation and corrosion resistance, long service life. Easy to Operate: Products and closely connected, convenient installation and disassembly smooth. Gold Plated Electronic Contact: Auto focus function, built in metal electronic contact, precise focusing. Ergonomic Release Button: Extinction processing is done inside to avoid reflection on the imaging impact. One click release, quick removal of the lens.