Sigma Zoom Wide Angle-Telephoto 28-200mm f/3.5-5.6 Compact Aspherical Hyper Zoom Macro Autofocus Lens for Sigma AF

This lens covers all the focal lengths from 28mm wide angle to 200mm telephoto, the most frequently used focal length range. With a maximum diameter of 70mm (2.75 in.) and length of 77.7mm (3 in.), it has a compact size.It packs a lot of performance in a compact package. Portable and mobile, the lens can be carried anywhere, so it is ideal for travel and other types of photography.Aspherical LensThe aspherical lens contributes more than compact size: it also delivers improved image quality. The use of aspherical lens elements in both of the front and rear lens groups effectively compensates for various aberration throughout the entire zoom range.Inner focusing systemThis design allows for stability and compactness in design as changes in focus are made in an internal lens grouping. This also gives the advantage of a non-rotating front lens assembly, which is of great benefit when using polarizing filter and Petal-type hood.Macro photography with a 1:3 ratioAt the 200mm telephoto setting, the lens is capable of macro photography with a 1:3.8 maximum magnification. The minimum focusing distance is 48cm at all zoom settings. And with a photography magnification scale displayed on the lens barrel, the lens is user friendly.Zoom lock switch mechanismA zoom lock switch mechanism is provided to prevent the lens from creeping due to its own weight, and to avoid the danger of the lens receiving a shock while it is being carried.&ref=Become