Sigma 19mm F2.8 DN Art Black Lens for Sony E-Mount NEX (40B965) + 3 Piece Filter Set + 2.2x Telephoto + 0.43x Wide Angle + Cleaning Kit + Dust Blower + Lens Brush + Cap Keeper + $50 Prints Gift Card Maximum aperture of f/2.8 is effective in low light situations and able to create lovely shallow depth of field images. Inner focusing system and linear autofocus motor for efficient, smooth, quiet and accurate focus. A special treatment to reinforce its strength is applied to the surface giving it greater strength and making it highly resistant to long-term use. Three glass molded aspherical elements and Super Multi-Layer Coating minimizes aberrations and reduces flare and ghosting for sharp, high contrast images. 47th Street Photo is an Authorized Sigma USA Dealer. This item is covered by 4 Year Sigma USA Warranty.