The Sony DT 11-18mm f/4.5-5.6 Wide-Angle Zoom Lens zoom lens captures interior scenes with greater flexibility and handles fast action in close environments. Internal Focusing System Lens elements at the rear of the optical system move, allowing rapid auto-focus response. Aspherical Lens Elements Aspherical elements correct frame distortion to provide more visually accurate super-wide-angle shots. ED (Extra-low Dispersion) Glass ED Glass lenses minimize flare and greatly reduce chromatic aberration, giving you photos with sharper focus and more accurate color separation. Circular Aperture In low-light shots or nightscapes, out-of-focus light sources have a pleasing circular defocused effect. Advisory when using DT lenses with full-frame (35mm equivalent) DSLR cameras. Sony α (alpha) lenses with the Digital Technology (DT) designation are ideal for use on APS-C size DSLR cameras and are not recommended for use with full frame DSLR camera bodies (such as the DSLR-A900). Although DT lenses can be used with full frame cameras, they can only realize a maximum of 11MP image size (when using the DSLR-A900)., and are not guaranteed to provide accurate Auto Exposure performance. Specifications: - Focal Length: 11 - 18mm - APS Equivalent: 16.5 - 27mm - Max Aperture: ƒ/4.5 - 5.6 - Min Aperture; ƒ/22 - 29 - 7 Diaphragm Blades - Lens Construction: 15 elements in 12 groups, including 3 aspheric and 1 ED glass elements - Diagonal Angle of View: (Based on image circle) 104 to 76 degrees - Internal Focus - Zoom System: Rotary - Closest Focus: 0.25m / 0.82 ft. - Magnification Ratio: 0.125x / 1:8 - Filter Size: 77mm - Dimensions: (Length x Diameter)80.5mm x 83mm / 3.25 in. x 3.75 in. - Weight 360g / 12.75 oz - Included Accessories: SH0009 Petal Lens Hood