The AF-S NIKKOR 300mm f/4D IF-ED from Nikon is a versatile telephoto prime featuring an f/4 maximum aperture that affords a useful balance between speed and a lightweight design. The 10 elements, six groups optical layout contains a pair of extra-low dispersion elements, which help reduce color fringing and chromatic aberration in order to achieve greater clarity and color accuracy. Super Integrated Coating is also featured and helps suppress flare and ghosting for greater contrast and color neutrality in harsh lighting conditions.  Telephoto prime is designed for FX-format F-mount cameras, however, can also be used with DX models where it will provide a 450mm equivalent focal length range. Super Integrated Coating has been applied to individual elements to suppress internal reflections, flare, and ghosting for improved contrast and color accuracy when working in strong lighting conditions. The rounded nine-blade diaphragm promotes a pleasing out-of-focus quality that benefits the use of shallow depth of field and selective focus techniques.