Product Description This is the Megadap ETZ21 Pro (not the Plus version). It's an adapter that allows you to mount Sony E-mount lenses on Nikon Z-mount cameras and use autofocus. I used it with Sony E-mount lenses on my Nikon Zf, but I'm selling it because I didn't use it often. It has been tested and is fully functional. Condition/Notes Because the mount is tight, I haven't frequently swapped lenses. There are some signs of use if you look closely, but there are no issues with its functionality.