Nikon continues to expand its line of F/1.8 prime lenses, this time adding a fast wide angle to the mix. The glass is coated with Nikon's Nano Crystal coat to fight ghosting and flare and inside is their Silent Wave Motor, both of which should be welcome inclusions for photo as well as video shooters. In total, it has 11 optical elements in nine groups, including two aspherical elements, which helps keep the size and weight down. It has full-time manual focus, even when AF mode is engaged.