7artisans EF-FX Lens Adapter Auto-Focus Lens Speedbooster Converter Ring Compatible for EF/EF-S Mount,Sigma Lens Mount and Fuji X Mount Mirrorless Camera Lens

"Features Auto Focus: EF-SE adapter adopts metal electronic contacts to support information sharing between lens and camera, bringing fast speed and smooth focusing experience.

With eye controlled focusing, supporting real-time tracking of subject to improve overall stability of shot.

Anti-shake Support: Adapter has built-in metal electronic contact and data chip, which is still effective."