I am using a Sony a6500 with the canon 70-200 f4l(nonIS)
-First thing I noticed is a little bit of play between the adapter and the lens. I can live with this but my $15 basic adapter didn't have this so I am a little bummed out I guess.
-As you might know, AF in video mode is completely useless which is ok with me. This is my photo lens and I dont mind manual focus video.
-Low light performance is poor. Camera will hunt for focus and most times it'll eventually get t but you'd be better off using MF in low light. When I say low light I mean for example a living room with the door open and natural light coming in, minimum artificial lights. It helps to be properly exposed.
-The lens makes a loud noise for a split second when the camera is turned on and off. I am pretty sure it wasn't doing this when I had it mounted on a Canon body. This doesn't effect the lens and camera performance at all but I am wondering if its normal??
-AFS AFC, and AF flexible spot modes only available which is plenty. Flexible spot seems seamless. It makes the canon feel like a native lens in average/good light.
-I like the design, its not a bulky adapter and I prefer the lack of tripod mount on it.
-Packaging was good and it came with a cable which is used to upgrade the firmware on the adapter(I haven't done this yet btw)
-Overall I am very satisfied with the performance. I dont mind MF but with such a long focal length, its hard to always get a perfectly crisp shot.