Review on Meike Auto-Focus Metal Lens Adapter EF-EOSR Converter for Canon 📷 EF/EF-S Lens to EOS-R, EOS-RP, R5, R6, and RED Komodo Cameras by Kevin Woods

Most reviews say it's a great adapter and all my EF lenses work very well with it. Autofocus is fast, build quality is excellent, Eye AF works great. I didn't expect to be as happy with this adapter as I am! Keep in mind that you will notice a difference in build quality as you start stepping into heavier glass. With the 70-200mm lens attached, I noticed very slight flexing or wobble. The average Joe might not notice this, but having used macro extension tubes with my DSLR, I knew what a little flex was. I suppose it would be worse with 100-400mm or even 150-600mm. *That little bend doesn't make me think it's going to break, but if you're going to be shooting a lot with a telephoto lens in the long run, you should definitely get a genuine Canon adapter as it's sturdier and fits perfectly overall.