The Tamron 16-300mm f/3.5-6.3 Di II PZD MACRO Lens for Sony is a wide-angle to telephoto zoom lens for Sony A-mount APS-C cameras that features a versatile 35mm equivalent focal length of 24-450mm. This provides users with an extremely wide-angle and super telephoto lens in one convenient package. Also, it has an aperture range from f/3.5-6.3 to f/22-40 across the zoom range. The 16-300mm is also capable of decent macro capabilities with a reproduction ratio of 1:2.9 when zoomed in to 300mm. This is due to a minimum focus distance of 15.3. Also, for excellent image quality, numerous special glass elements are used in the lens design. There are one Hybrid Aspherical element, three Molded-Glass elements, two Low Dispersion elements, one Extra Refractive Index element, and one Ultra-Extra Refractive Index element. For general use, there is a Piezo Drive autofocus system which is powered by a fast and quiet standing-wave ultrasonic motor. This allows you to quickly achieve focus for sharp images. And, included with the lens are a flower-shaped lens hood as well as front and rear lens caps.