The Sigma 12-24 D F4.5-5.6 EX DG HSM is a wide-angle lens suitable for Nikon cameras of FF and APSC format. The focus is automatic and takes place via ultrasound AF engine, image stabilization is not present. The corner of this complaint is very large, varies according to the focal length used and is 122 degrees with focal length 12, while at Focal 24 it is 84.1 degrees. The minimum focusing distance is 28 centimeters and the chasters are incorporated so it cannot be removed. The rings are in rubber and subject to wear and dirt, the front lens is definitely pronounced and could lead to easy accidental impacts. Average weight and dimensions, the materials are subject to wear and are very delicate. The photos taken are clear, without remarkable distortions. There is a remarkable vignetting, in particular on the edges, where it also loses sharpness. A light flare is also found that could annoy the most demanding photographers. The Sigma 12-24 D F4.5-5,6 EX DG HSM Nikon is a wide angle with a very pronounced field opening, excellent for those looking for a lens with these characteristics. It can be used independently of both professionals and by amateur photographers and lends itself to various photographic genres even if such a lens finds its maximum expression with landscape or architectural photos.