Key Features F-Mount Lens/FX Format Aperture Range: f/2.8 to f/22 Super Integrated Coating Rounded 7-Blade Diaphragm A comfortable wide-angle, the Nikon AF NIKKOR 28mm f/2.8D is a compact and versatile lens well-suited for landscape, nature, and documentary shooting. Its modest f/2.8 maximum aperture strikes a balance between its sleek form factor and being fast enough for working in low-light conditions. In regard to the optics, a Super Integrated Coating has been applied to individual elements to control flare and ghosting for improved contrast and color rendering when working in bright and backlit conditions. Additionally, a rounded seven-blade diaphragm contributes to a pleasing bokeh quality. Wide-angle prime lens is designed for FX-format Nikon F-mount cameras, however can also be used with DX models where it provides a 42mm equivalent focal length. Flexible f/2.8 maximum aperture suits working in a variety of lighting conditions and also offers depth of field control for isolating subjects. A 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. Autofocus system is compatible with select Nikon DSLRs that support D-type lenses, and offers quick and precise focusing performance. Autofocus is not supported by DSLRs lacking an autofocus motor, such as the D3000-series, D5000-series, D40, D40X, and D60, where the lens may be used with manual focus only. Rounded seven-blade diaphragm promotes a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.