Feature:1. Support AF autofocusing, fast and stable autofocusing function to make your shooting more clear and natural.2. Support EXIF information transmission, support AF autofocusing, fast and clear focus function, in the moving scene shooting can quickly focus.3. Gold plated contact, removable 1/4in. tripod base, gold plated electronic contact, enhanced data transmission, tripod base can be connected to the tripod and light frame.4. 0.71 times reducing focus and increasing light, effectively reducing the focal length, increasing aperture, increasing the amount of light;Builtin USB firmware upgrade port, expand compatible upgrade.5. The electronic aperture IS adjustable, and the aperture scale IS accurate and easy to adjust, making your shooting more professional. It supports the IS antishake function, and the antishake function allows you to shoot the picture as clear as usual under various scene such as movement and capture.Specification:Item Type: Adapter RingMaterial: Aluminum AlloyColor: BlackWeight: Approx.246g/8.7ozModel: EF-FX BoosterBayonet: EF/EF-S Bayonet, FX BayonetCompatible Lens: EF/EF-S Mount LensCompatible Camera: FX Mount Camera BodyFront Mount: EF/EF-S Mount LensBack Installation: FX Mount Camera BodyPeripheral Diameter of the Camera End: 61mm/2.4inPeripheral Diameter of the Lens End: 67mm/2.6inApplicable Model:for Fuji X-T1 X-T2 X-T3 X-T4 X-T10 X-T20X-A1 X-A2 X-A3 X-A5 X-A10 X-A20X-E1 X-E2 X-E13 X-E2S X-H1X-PRO1 X-PRO2 X-PRO3.Package List:1 x Adapter Ring2 x Adapter Ring Protection Cover (Installed)1 x Manual