I find in used things store for 12$  for Konica end , and take me a time for get the adapter for nex in my region i find nowhere so i buy on internet from China one :)  It s a big surprise for me this lens my first shot was on streets i shot a walking girl from other side of the street about 5-6 meters .when i zoomed the photo i find is incredible sharp and details , after i go home and i shot closer things it has beautiful big bokeh too . This version of lens Vivitar 35mm Auto Wide angle with Konica end  i Highly recommend this lens :)