This Nikon Nikkor AF-S lens introduces an ultra-wide angle design that produces a smaller image circle (the size of the image that is projected by the lens on to the sensor), which in turns allows for a smaller lens diameter and yields optimal image quality from center to edge to corner. The Nikon lens design allows for wider angle-of-view with optical characteristics optimized for Nikon digital SLR camera sensors. The 12 mm-24 mm f/4.0 DX lens features G-type zoom and extra low-dispersion glass elements (ED) for minimized chromatic aberration, as well as internal focusing (IF) for smoother focusing and body balance. This Nikon Nikkor AF-S lens provides precise distance information for flash and ambient light exposure processes, as well. The 12 mm-24 mm f/4.0 DX lens is equipped with a Silent Wave Motor (SWM), enabling ultra-high-speed autofocusing with incredible accuracy and quiet operation. Three aspherical lens elements minimize distortion on the Nikon lens and a switch enables toggling between autofocus and manual focus with almost no time lag. The lightweight design of the Nikon lens allows it to fit comfortably on compact digital SLR camera bodies.