Sigma 401306 24 mm f/1.4 DG Art Lens for Nikon Mount , Black

Large aperature wide-angle lens offering the best optical preformance in its category FLD, SLD and Aspherical lens elements. Minimum focusing distance is 25 cm Super Multi-Layer lens coating reduces flare and ghosting Includes fast and near silent HSM autofocus Compatible with Sigma USB Dock. Filter size required is 77 mm USB Dock can be used by attaching it to a lens mount, therefore, each USB Dock is dedicated only for a particular mount. Please note, USB Dock does not operate with commercially available mount conversion adapter