High-Powered 18-200mm Zoom Lens, Designed for Use With Sony NEX Cameras, Stepping Motor for Improved AF, Lightweight 16.2 oz Lens, Equivalent to 27-300mm Lens. The Tamron 18-200mm F/3.5-6.3 Di III VC Lens for Sony E Mount Cameras (Black) made for the Sony E mount camera system incorporates a stepping motor that is optimal for the contrast-detection AF system of Sony mirrorless interchangeable-lens cameras. This will also improve AF when shooting video. With the motor built into the lens focusing will be quieter and more responsive. The 18-200mm f/3.5-6.3 Di III VC is a high power zoom lens designed exclusively for digital SLR cameras using the more compact (APS-C) digital size image sensors. The focal length of this lens is equivalent to approx. 27-300mm in 35mm format.Designed as an all-in-one lens it meets almost all photographic opportunities without changing lenses. The 18-200mm zoom lens realizes an MFD (Minimum Focus Distance) of 1.5' (45 cm) over the entire zoom range by the employment of a new optical/mechanical design configuration. Since the maximum magnification ratio at f=200mm is 1:3.7 you can enjoy close-up photography easily and conveniently.