The Pentax 100mm Macro f2.8 AF lens is exclusively designed for pentax digital cameras. The new Pentax lens make use of curvature and positioning of optical elements to produce a crystal clear image. The use of this curvature virtually eliminates flare and ghosting to produce a very clear and high-quality images. Pentax 100mm Macro f2.8 AF lens can also double and be used as a telephoto lens. It features Pentax de-facto multi-layer coating to lower surface reflection. This superb coating only prduced by pentax reduces_ultraviolet_rays and delivers clear, high-contrast images.