A smart ultra-wide, the AF-S NIKKOR 20mm f/1.8G ED from Nikon blends a desirable broad field of view with a sleek form factor, a bright design, and a sophisticated optical layout. The fast f/1.8 maximum aperture excels in difficult lighting conditions and also offers increased control over depth of field. The optical design incorporates both aspherical and extra-low dispersion element to minimize spherical and chromatic aberrations for greater sharpness and clarity.