The next generation ultrawide angle zoom lens designed to support ultra-high resolution. This professional Full-frame f/2.8 Ultra-Wide Angle Zoom Lens employed a newly developed 16 elements in 11 groups design. It uses of 2 large-diameter Glass-molded (GMo) double-surface aspherical lens elements and 1 ground aspherical lens to reduce distortion, curvature of field and astigmatism significantly, achieving huge improvement in image quality from center to peripheral throughout the zoom range. It also includes 2 Ultra-low Dispersion (UD) lenses to minimize chromatic aberration of magnification and reduce color blur around the edges of subjects, giving high quality image of high levels of resolution and high contrast. Both SWC (Subwavelength Structure Coating) and ASC (Air Sphere Coating) are featured in this lens to suppress the ghosting and flare.