Review on 📸 Fringer EF-FX PROII Auto Focus Mount Adapter: Seamless Lens Compatibility for Canon, Tamron, and Sigma Lenses to Fujifilm FX Mirrorless Cameras X-T3, X-H1, X-E3, XT20, X-Pro2, X-T2, X-T4, X-A, X-E1, X-M1, XT1, X-T30 by James Rogers

Although this adapter is expensive, it does the job well. There aren't really many alternatives with autofocus and aperture control (which is important for Fuji cameras since most lenses have aperture control). I have this adapter specifically for use with my Sigma 150-600mm f/5-6.3 Contemporary and my Fuji X-Pro 2. It's hard to tell if the OS is working properly, I've heard it activated ( btw, its make sure you disable the OS on your lens before turning off the camera, i'm not sure if the lens will lock itself if it loses power, so it's better to be wrong, just in case.), but I honestly don't see a difference, but it could just be me or the camera firmware, who knows. My only real complaint is that it pushes/pulls focus quite a bit if it doesn't succeed on the first try, but at least it's fast so it's not a big deal. Also check if your lens is on the compatibility list. I've tried some lenses that aren't and it's a bit random, it works, but not very well with unsupported lenses. Like I said, there really isn't anything else that compares, so I still highly recommend it.