Sony 16-50mm f/2.8 DT Alpha A DSLR Mount Zoom Lens - Bundle with 72mm Filter Kit, Medium Lens Case, Cleaning Kit, Pc Software Package Sony 16-50mm f/2.8 DT Alpha A DSLR Mount Zoom Lens - Front and Rear Lens Caps - SH117 Lens Hood - Sony 1 Year Warranty - Bundle Includes: - 72mm Filter Kit (UV/CPL/ND2) - Medium Lens Case - Lens Wrap (19x19) - Cleaning Kit - Software Package (Includes Corel PaintShop Pro X9; Corel VideoStudio 9; Corel AfterShot 2 Pro; AutoFx Mystical Ultimate Bundle Gen2; FileCenter Professional) DT Lens Design A more compact lens designed specifically for use with APS-C size sensor ED (Extra-low Dispersion) Glass To reduce chromatic aberration at telephoto extension, correcting certain wavelengths of light for sharp, clear images with well defined colors Wide f/2.8 aperture The SAL1650 features a large f/2.8 aperture for fast response and superb depth-of-field Circular Aperture Because aperture blades form a near circle at the wide openings used for low-light shots, spot-light sources have a pleasing circular defocused effect