Tamron Zoom SP AF 17-50mm f/2.8 XR Di II LD ASL IF For Sony This is NZ new with full NZ 12 month warranty not grey market import! This lightweight, compact, fast standard zoom lens made for the Sony SLR system incorporates a motor built into the lens itself, which gives it the capability to autofocus. The use of XR (Extra Refractive Index) glass optimizes the overall distribution of optical power, and also reduces various aberrations to the absolute minimum while achieving remarkable compactness. In addition, suitable positioning of two hybrid aspherical elements serves to maintain imaging performance and to shorten and compress the entire optical system. LD Glass An LD glass element is used to accomplish effective compensation of on-axis and lateral chromatic aberrations, a critical factor for enhancing optical quality in digital photography, in order to achieve outstanding optical performance over the entire zoom range. Peripheral light fall-off is minimized when compared with that of conventional lenses for film cameras, so images are uniformly bright from the center to the periphery. Internal Surface Coating to Reduce Ghosting and Flare By employing "Internal Surface Coatings" (i.e., multiple-layer coatings on cemented surfaces of plural elements) and multiple-layer coating technology on ordinary elements, ghosting and flare due to the reflections that occur when light enters through the front element and reflections caused by the imagers themselves are reduced to the absolute minimum. Zoom Lock Mechanism Focal 17 - 50 mm Aperture Maximum: f/2.8 Minimum: f/32 Camera Mount Type Sony Alpha, Minolta AF Format Compatibility DSLR (APS-C Sensor) Angle of View 78° - 31° Minimum Focus Distance 10.63" (27 cm) Magnification 0.22x Maximum Reproduction Ratio 1:4.5 Groups/Elements 13/16 Diaphragm Blades 7 Image Stabilization No Autofocus Yes Tripod Collar No Physical Filter Thread 67 mm