The Canon EF-S Zoom 18-200mm f/3.5-5.6 IS is a super zoom lens, manufactured by Canon. The Canon EF-S 18-200 has automatic panning detection to ensure effective performance when tracking moving subjects.The much-requested Canon EF-S Zoom 18-200mm f/3.5-5.6 IS lens was finally delivered by Canon as an accompaniment to the EOS 50D. The Canon EF-S 18-200 features and awesome focal length range (one that completely covers the needs of many photographers) and an excellently-performing IS system in a nicely-sized body. The EF-S 18-200mm f/3.5-5.6 IS features a 16 element, 12 group construction. This includes UD and aspherical lens elements, which minimize chromatic aberration and ensure crisp, corner-to-corner detail across the zoom range. A close focusing distance of just 45cm offers photographers total framing flexibility. Supporting a zoom range of approximately 11 times, the Canon EF-S 18-200 covers a focal length equivalent to 29-320mm in 35mm format but weighs only 595 grams. Built-in image stabilization provides approximately four f-stops of shutter speed advantage and the stabilization system can detect when the camera is panned. Consisting of 16 elements in 12 groups, this Canon EF-S 18-200 lens is made from environmentally friendly lead-free glass and contains UD glass and high-precision aspheric elements. The Canon EF-S 18-200mm f/3.5-5.6 IS is designed exclusively for use with EOS cameras featuring an EF-S lens mount - including the new EOS 50D, EOS 1000D, EOS 450D, and earlier models. Canon EF-S Zoom 18-200mm f/3.5-5.6 IS key features: • 18-200mm focal range is a 35mm equivalent of 29-320mm • Optical Image Stabilization (IS) good for 4-stops of hand-holding shutter speed reduction • Minimum focusing distance of 1.5 feet (0.45 meters • A front element that does not rotate when zooming, keeping your polarizer filter in it’s proper position see the Canon EF-S Zoom