Fringer EF-FX Ultra Lens Mount Adapter Compatible with Canon EOS EF Lens to Fujifilm X-T50 X-H2s X-T5 X-Pro3 X-S20 XT4, Autofocus Electronic Aperture, Enlarge 1 Stop Aperture, Focus Reduction 0.74x

Compatible with Fujifilm Cameras:X-Trans V CMOS (PDAF, better performance)X-T50X-H2SX-H2X-T5X-Trans IV CMOS (full sensor covered PDAF, Better performance)X-T30IIX-E4X-T4X-S10X-Pro3X-T30X-T3X-S20X-Trans III CMOS (PDAF, Good performance)X-H1X-T20X-E3X-Pro2X-T2Canon EF Lenses that have been tested and optimized (and optimized for PDAF)14/2.8L II24/1.4L II28/2.8L35/1.4L35/1.4L II35/2L40/2.8 STM50/1.2L50/1.4L50/1.8 II50/1.8 STM85/1.2L85/1.2L II85/1.4L IS85/1.8L100/2.8L135/2L200/2.8L II200/2.8L II + 1.4X400/5.6L16-35/2.8L II16-35/2.8L III16-35/4L IS17-40/4L20-35/2.8L24-70/2.8L24-70/2.8L II24-70/4L IS24-105/4L IS24-105/4L IS II70-200/2.8L70-200/2.8L IS70-200/2.8L IS II70-200/2.8L IS II+1.4X70-200/2.8L IS II+2X70-200/4L70-200/4L IS70-200/4L IS + 1.4X70-300/4-5.6L IS70-300/4-5.6 IS II100-400L IS100-400L IS IISigma Lenses tested:24/1.4 art30/1.4 art35 /1.4 art50/1.4 art85/1.4 art135/1.8 art8-16/4.5-5.610-20/3.517-50/2.818-35/1.824-35/2 art50-100/1.8 art100-400/5-6.3 OS C017150-600/5-6.3 OS60-600/4.5-6.3 OS50/1.4 EXTamron Lenses tested:35mm f1.850mm f1.485mm f1.8135mm f2LSP90/2.8 VC F00410-24/3.5-4.5 Di II VC HLD B02318-400/3.5-6.3 Di II VC HLD B028100-400/4.5-6.3 Di VCA few of them may have compatibility issues.Please wait for the next firmware update for better lens compatibility.

• Fringer EF-FX ULTRA, Focal reducer/Speed booster version(used on Fujifilm FX Mirroless Cameras), Get approximately 1-stop faster aperture, 0.74x Focal Length Reduction, Improved Light Amplification. High-performance optical design: 5 elements in 2 groups, Keep full-frame EF mount lenses' optical performance
• Ultra generation{canon ef to fuji x adapter}! Electronic aperture ring for more convenient operation; New MCU (more powerful, more resources for firmware update); Better light absorbing design; lens bayonet and camera bayonet are made of brass, the weather-sealed design with gasket (dust-proof and drip-proof)
• For Canon EF lens to Fujifilm X mount bodies, PDAF mode (phase detection auto focus) Better performance for Fuji X-T50, X-H2, X-T5, X-H2s, X-Pro3, X-S20, X-T4, X-E4, X-T3, X-T30II, X-T30 cameras, FAST AND ACCURATE PDAF, *Only on cameras with X-Trans III, IV& V CMOS
• Theoretically, all EF mount lenses are supported, but due to differences in the lenses themselves, not all lenses will get the best performance. Note that due to conflicts with focal reducer (speed booster), incompatible with EF-S lenses, there may be problems such as not being able to mount them, or problems with dark corners, black corners, etc., which are just as likely to be present even with the EF-S lenses on the optimized list
• Aperture setting: Turn the command dial on the camera to set the F number, each small step is 1/3 stop. With a focal reducer (speed booster) built in, you get one stop faster. For example, you will get a maximum aperture of F1.0 on an EF50/1.4 lens
• ALL LENS INFORMATION; Lens model; Focal length; Aperture setting; Support Image Stabilizer functions of EF mount lenses. Supports firmware updates via USB to ensure compatibility with future lenses and FX housing updates. A great smart adapter, not included Camera