Pairing an ultra-wide range with a constant f/4 maximum aperture, the Nikon AF-S DX Zoom-NIKKOR 12-24mm f/4G IF-ED is a versatile 18-36mm-equivalent DX-format zoom suitable for landscape, architectural, and interior subjects. Three aspherical elements and two extra-low dispersion elements are featured in the optical design, which help to reduce color fringing and chromatic aberrations in order to produce high clarity and color accuracy.