Andro Giorgadze
I dont know why everybody is repeating the same thing that 50 mm is what a human eye sees on a full frame and thus recommends that focal length. 35 mm on a full frame is what our eye sees. I do like 50 mm prime, it is very portable and does very nice panoramas, however for environmental portrait I prefer 35 mm on a full frame, it gives much more room and you can get a little close to the subject. When I feel like using 50 mm I almost always want 85 mm, so 50 mm for me is a not very interesting. But then again, it is a matter of taste. Some people probably like 50 mm more. I would not be concerned about sharpness of this lens, they are super sharp these days, more than enough, the color and bookeh are more important to me and I have to say that both color and bokeh of this lens are very beautiful, better than Sigma Art. Also, I find that focusing on Nikon is much better than Sigmas.