I started a new thread, simply because I think the "image thread" is getting choked with non-image discussion. I have a copy, and updated my camera FW. I am primarily an a6000 shooter, mostly for compactness. I sometimes shoot an a7 for events. I have the 28/2 which acts as a 42/3.0 on the a6000. I also have a Sigma 60/2.8, which can cover much of the Full frame image circle. The FE28 focuses faster and more sure on the a6000 than the FE50 (and also feels like it has a higher build quality, oddly enough). The FE50 focuses no better than the Sigma 60. I need to run more tests (I need to really see what it offers in 1.8-2.5 range), but I think I'm inclined to return it, given my case. HOWEVER, I want this lens to succeed commercially, so Sony makes more affordable lenses. If I was all FF, then I think it's a lens to keep. But for me, it feels redundant.