The lens Nikon AF-S Nikkor 50mm I use on my Nikon D7100. I have added myself for street photography and night shots, even b / w photographs. The recommendations here and in my research on the net have induced me. Front- and back focus function perfectly because some buyers complain about that. Therefore, I have loaded my immediate focus detector from the network. Processing I personally find very good and the appearance also. I like working with my 50mm lens, but my enthusiasm still remains limited, since I had "sharper" presented photos. Pity!