Hyper Sonic Motor: Gives you smooth, fast and quiet autofocusing that is ideal especially when shooting videos Functional Design: It features super multi-layer coating that benefits the overall image quality by reducing reflections and flare Creative Photography: The lens has the ability to produce outstanding image quality thanks to its large constant f/1.8 maximum aperture Creative Photography: The lens has the ability to produce outstanding image quality thanks to its large constant f/1.8 maximum aperture