This 24mm lens has a fast f/1.8 maximum aperture with macro focusing capability (minimum focusing distance is 7.1" for a reproduction ratio of 1:2.7). The 9-bladed aperture diaphragm obtains beautiful, circular out of focus characteristics. It incorporates a floating focus system and uses two aspherical elements for minimized distortion, spherical aberration and astigmatism. The lens front does not rotate during focusing, thus allowing the use of a "perfect hood" and the easy polarizing filters. Optical construction was created to minimize light falloff (darkening of the image corners) at maximum aperture-a big benefit particularly for digital cameras. Materials used in this lens are lead and arsenic free ecological glass.Manufacturer Included Items:Sigma Wide Angle 24mm f/1.8 (D) EX Aspherical DG DF Macro Autofocus Lens for Sony Alpha & Minolta Maxxum SeriesFront & Rear Lens CapsHoodCaseBundle Items Include:1 x Sigma Wide Angle 24mm f/1.8 (D) EX Aspherical DG DF Macro Autofocus Lens for Sony Alpha & Minolta Maxxum Series1 x Full Size Deluxe Tripod1 x Secure Digital High Speed 32GB Memory Card1 x Lens Cleaning Solution1 x Cleaning Cloth1 x Dust Blower1 x Lens Pen1 x Memory Card Wallet1 x USB Card Reader1 x Microfiber Cloth