Fringer C645-GFX II AF Lens Adapter for Contax 645 C645 Lens to Fuji GFX Camera
Contrast AF is supported for GFX50S/50R/50S II. - Phase detection AF is supported for GFX100/100S. In any cases that you don't want AF, MF is also available. - Firmware upgradable (through built-in micro USB port).