How does the Sigma 14-24mm F2.8 Dg Hsm Art Lens redefine ultra-wide-angle photography Engineered for excellence, this lens is a paragon of the Art line's high-quality optics, designed to complement cameras with 50-megapixel resolutions and beyond. With its constant F2.8 aperture, it maintains exceptional brightness across the entire zoom range, ensuring that every shot captures the essence of clarity and detail.Crafted with precision, the lens architecture incorporates an array of specialized elements: three Fld glass elements, three Sld glass elements, and three aspherical lens elements, including a large-diameter aspherical element. This meticulous arrangement effectively corrects chromatic aberration and other optical distortions, delivering images with superior resolution and sharpness.The Sigma 14-24mm F2.8 Dg Hsm Art Lens boasts a large-diameter aspherical lens at the forefront of its optical system.