The Tamron 28-300mm f/3.5 -6.3 Di PZD Lens is a wide-angle to telephoto zoom lens for Sony A-mount full-frame and APS-C electronic cameras. It offers users with an exceptionally versatile all-purpose lens in a compact design and on APS-C electronic cameras it has a zoom variety equivalent of 42-450mm. Also, it has an aperture variety from f/3.5 -6.3 to f/22 -40 throughout the zoom range.The 28-300mm is also capable of decent macro abilities with a reproduction ratio of 1:3.5 when focused to 300mm. This is because of a minimum focus range of 19.3". Also, for excellent image quality, many special glass aspects are used in the lens design in addition to Broad-Band Anti-Reflection finishings. There are one Hybrid Aspherical component, 3 Molded-Glass aspects, four Low Dispersion aspects, one Bonus Refractive Index component, and one Ultra-Extra Refractive Index element.For basic usage, there is a Piezo Drive autofocus system which is powered by a fast and peaceful standing-wave ultrasonic motor. This allows you to rapidly accomplish focus for sharp images. And, consisted of with the lens are a flower-shaped lens hood along with front and rear lens caps.