The SIGMA 17mm F4 DG DN | Contemporary delivers supreme compactness in the widest "I series" lens to date. Announced concurrently with the 50mm F2 DG DN | Contemporary, this expands the I series to 9 lenses ranging from 17mm to 90mm. This super-compact, ultra-wide angle lens weighs just 220g with a length of 48.8mm, and is designed specifically for full-frame mirrorless systems.The SIGMA 17mm F4 DG DN | Contemporary is an exceptional lens in terms of angle of view, optical performance, and build quality, with a design inspired by SIGMA Cine lenses. As an I series lens, it features a metal barrel with knurled focus ring, aperture ring and lens hood. Both metal magnetic and snap-on lens caps are provided.Less ThanbRGreater ThanThe 17mm F4 DG DN | Contemporary offers high optical performance and close-up shooting capability that greatly expands the range of creative expression.Less ThanbRGreater ThanLess ThanbRGreater ThanBy shortening the overall length of the lens and making changes to the focus configuration, the lens is capable of focusing as close as 12cm with an impressive magnification ratio of 1:3.6, allowing for unique close-up photographs with expansive backgrounds, making it particularly appealing to vloggers, hikers, landscape photographers and more. A stepping motor offers swift, precise AF for both still and video applications. Furthermore, the lens has minimal focus breathing, so that users are able to capture natural images with virtually no compositio