The Tamron 28-300mm f/3.5-6.3 Di VC PZD Lens for Canon is a wide-angle to telephoto zoom lens for Canon EF-mount full-frame and APS-C cameras. It provides users with an extremely versatile all-purpose lens in a compact design and on APS-C cameras it has a zoom range equivalent of 44.8-480mm. Also, it has an aperture range from f/3.5-6.3 to f/22-40 across the zoom range. he 28-300mm is also capable of decent macro capabilities with a reproduction ratio of 1:3.5 when zoomed in to 300mm. This is due to a minimum focus distance of 19.3". Also, for excellent image quality, numerous special glass elements are used in the lens design in addition to Broad-Band Anti-Reflection coatings. There are one Hybrid Aspherical element, three Molded-Glass elements, four Low Dispersion elements, one Extra Refractive Index element, and one Ultra-Extra Refractive Index element.