Anyone who bought a nikon kit, with the standard 18-55 , 55-200 for DX cameras, i.e. 5000-5300, 3000-33000, and the D7100-D7200. This is the first prime you should buy. Equivilant to 50mm on a FX -lens, presents a natural field of view. Best Use: Indoor , shots of kids moving/zooming past. The zoom lens simply can't focus fast enough. The 1.8 aperture is not so usable, too shallow depth of field but 2.2 to 2.8 provide great low-light shots.