Nikkor AF 50mm f/1.4D
Nikon Nikkor 50mm lens, a very normal and ordinary lens since the beginning of photography. It is actually very hard for a manufacturer to make a bad 50mm lens, as this lens has been around for many many years, and during the old time, 50mm lens always come as a standard lens for a camera. Thus, 50mm lens is called as standard lens as well.
Among the various 50mm lens design, there are f2.8, f2, f1.8, f1.4, f1.2 and the fastest f1.0. In Nikon, the fastest is f1.2 that I used to own before.