A versatile zoom lens for everyday shooting, this SP 28-75mm F/2.8 XR Di Lens from Tamron covers a useful wide-angle to portrait-length range of focal lengths to suit photography in a variety of environments. Its internal auto focus motor provides quick and precise focusing performance, while a sophisticated optical design that incorporates XR (Extra Refractive Index) and LD (Low Dispersion) glass among 16 elements and 14 groups helps to improve sharpness, contrast, and color accuracy. To benefit working in difficult lighting conditions, a wide, f/2.8 constant maximum aperture affords consistent brightness throughout the lens's zoom range.