Where do I even begin with this lens? I bought it new with my Nikon D90 and have been using it for almost 7 months now. I bought is specifically to help develop my composition skills. Since it’s a fixed focal length (prime lens) you’re more or less forced to walk your way around your subject to get that frame just the way you want it. Of course it’s a 50mm lens but if you’re mounting this on a DX format camera (like the D90 for instance) it becomes a 75mm with the crop factor considered.