According to Nikon: "Nikkor is a lens brand for cameras that symbolizes the spirit of Nikon. It is "an instrument of light" brand where advanced engineering technology and traditional lens craftsmanship are combined at the highest level." This brand of lenses are compatible with Nikon's camera and is very useful for professional photographer to achieve the most delicate images. It's types vary accordingly to their purposes: zoom, manual-focus, single focal length, etc.