I got the 50/1.8 for the A7. I compared it to the Canon FDn 50mm f1.4 at f1.8 and the newer lens does produce better results. However, a couple things. Does your FE 50/1.8 screw really tightly onto the A7ii lens mount? As it twists on it doesn't feel smooth either (it feels smooth when it twists off, however). Also, the autofocus really plastic-sounding and loud. Are these two things normal? I'm already sending it back as to not damage my camera. Not sure if the next one will have the same issue. On Micro Four Thirds I think I bought 2 or 3 Panasonic 20mm f1.7 lenses and all were too tight. Finally I got one from another time period that fit better.