The Sigma Wide Angle 28mm f/1.8 (D) EX Aspherical DG DF Macro Autofocus Lens for Sony Alpha & Minolta Maxxum Series is the ideal general purpose wide angle lens. Its wide enough for most scenic and landscape assignments and when used indoors for building interiors or groups of people, its wide angle effect is not as extreme as with shorter focal length lenses. A forgiving wide angle lens for newcomers to wide angle photography and highly effective for professionals with its EX construction and fast 1.8 aperture. This high speed performance is excellent for photojournalists doing low-light documentary photography and its use of two aspherical lens elements assures excellent optical performance.Features: Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors.Two Aspherical glass elements offer correction for distortionCapable of Macro photography with minimum shooting distance of 7.9 inches and provides a reproduction ratio of 1:2.7Floating optic focusing system optimizes this lens for various working distances in order to provide excellent quality imagesA non-rotating front lens makes it suitable for a petal-type hood and polarizing filtersA lens hood, front/rear lens cap and carrying case are included with the lens.