This large aperture medium telephoto lens ensures a natural perspective. The attractive blur of F1.4 is ideal for portrait, landscape and low light photography. SLD (Special Low Dispersion) glass and a molded glass aspherical lens element provide excellent correction of all types of aberrations. High image quality is assured throughout the entire focusing range and the super multi-layer coating reduces flare and ghosting. This lens provides sharp and high contrast images even at the maximum aperture of F1.4. The incorporation of HSM (Hyper Sonic Motor) provides fast and quiet autofocus and the rounded 9 blade diaphragm creates an attractive blur to the out of focus areas of the image.