The Sigma 18-35mm f/1.8 HSM DC Lens For Nikon is a must-have piece of kit for any serious photographer. The aperture range of f/1.8-16 is ideal for a variety of image capture scenarios, with the fast constant maximum perfect for steady shots with high color detail. The 35 mm equivalent focal length means you can capture shots with the utmost clarity, for a true visual render of your subject. Five special low-dispersion glass elements reduce distortions and aberrations to keep your photography as pure as possible, while a thermally stable composite material ensures the lens responds as you would expect in any temperature or environment - ideal for those looking for a lens that functions as effectively indoors as it does outdoors.