VILTROXEF-NEX IV Electronic Auto-Focus AF Lens Mount Adapter Ring Automatic Converter Compatible with Canon EOS EF/EF-S Lens to Sony E-mount NEX A9II A7III A9 A7RIII A7RII A7II A7R A7m3

"The autofocus on the Sony FX3 is not working."

I normally dont write a review, but it took me years and lots of research and now this is the only adapters where i can you all of my canon L glass on my Sony A7iii with video autofocus. Metabones and other so-called high end brands can't even touch this feature. The only cons you will notice ad might bother you is that sometimes you have to detach and attach the adapters with lens again in order to get it functions. It really dont bothers me at much after i got used to compares to manual focus.

Keeps glitching on my Sony A7RVAuto focus does NOT work at all, and it keeps freezing up my camera to the point I have to remove the battery to even get it to start working again. Sending it back.

The autofocus for photos is pretty solid. Not perfect or as fast as native glass. But pretty good. Less great for video so don’t have super high expectations. This depends on which canon glass you have though. They have a full compatibility list on their website as well as a forward update so check it out! I got this because I didn’t want to let go of my canon 50mm STM 1.8 😂 but I also want some other canon glass in the future.

This is an inferior product if you need autofocus. Even in APS-c mode, it will work only with manual focus and if you install the firmware update version 1.9, it will fail altogether. It has no real product support as the vendor website is terrible. Do not buy this product.

I am able to use all my EF mounts on my Sony A6300, but it takes forever to focus in live mode... if it even does. Nor does the adapter allow you to back focus. Image Quality is great... but... other then that... I wish I purchased a high end Metabones adapter.

I use this for sports video, shoot on wide aperture so as to not worry about autofocus(Sony A7III with Canon 200-400)

Received mine on an overnight delivery with great hopes that it will work well with my Sony A7R4. Out of the box and mounted right on to my camera, attached my Sigma Art 85mm 1.4 Canon lens onto it, and first thing I noticed after attempting to take my first shot, was that it would start hunting for my subject, and even after it finally "locked" on, the image was still not in focus. I turned off my autofocus and noticed that it worked ok, but I had to turn my focus peaking just to make sure that I was in focus. This adapter would not be ideal in a real world situation do to having to manually focus your lens each and every time. Now if you're fine with that, then maybe this might be for you, but Keep in mind, that there were some other features that would not work with this adapter.