Andoer EF-GFX Camera Lens Adapter Ring Auto Focus Replacement for Canon EF-mount Lens to FujiFilm GFX-mount MED-format Cameras GFX100 GFX50S GFX50R Features: EF-GFX camera lens adapter features auto focusing for digital adjusting, no need to manually control. Replacement for Canon EF-mount lens to FujiFilm GFX-mount med-format cameras, GFX100 GFX50S GFX50R. It is with inbuilt electronic contacts and the bayonets are made of metal with surface plating treatment, durable and sturdy. With EF and EF-S lens mounting index and camera mounting index on the sides for precise mounting. Metal contacts ensures high speed transmission, and the lens release lever makes detachment easier. Specifications: Brand: Andoer Model: EF-GFX Color: Black Material: Metal Net Weight: 7.7 * 2.5cm / 3.03 * 0.98in Dimension: 79g / 2.79oz Package Size: 10.7 * 9.3 * 5.8cm / 4.21 * 3.66 * 2.28in Package Weight: 120g / 0.26oz Tested Compatible Lens: CANON EF 35/1.4 I/II CANON EF 28/1.8 CANON EF 40/2.8 CANON EF 50/1.2L CANON EF 85 F/1.2L II CANON EF 85 F/1.8 CANON EF 85 F/1.4 CANON EF 100mm f/2.8L IS USM Macro lens CANON EF 135mm f/2L USM CANON EF 200mm f/2L IS USM CANON EF 400mm f/4 DO IS II USM CANON EF 500mm f/4L IS II USM CANON TS-E 17 F/4L CANON TS-E 24 F/3.5L II CANON TS-E 90 F/2.8 CANON TS-E 40 F/2.8 CANON EF 70-200mm f/2.8L IS II USM(have dark corner, can be removed after tele-lens) CANON EF 70-200mm f/2.8L USM (have dark corner, can be removed after tele-lens) Sigma lens: SIGMA 35 f/1.4 ART SIGMA 50 f/1.4 ART EX/GD SIGMA 85 f/1.4 ART SIGMA 135 f/1.8 ART SIGMA 150-600/5-6.3 Zeiss lens: OTUS  55/F1.4 OTUS  85/F1.4 Note: The USB interface on the adapter does not support upgrade function. Can not be fully compatible with GFX100S camera, some functions might not support at current version of firmware. Packing List: 1 * Camera Lens Adapter Ring