The EF 70-200 f4 L IS USM is alightweight, compact L Series telephoto zoom lens with Image Stabilizer. Theoptical Image Stabilization in the new EF 70-200mm f/4L IS USM lens provides upto an incredible four stops of shake correction-a first for Canon IS lenses.The use of fluorite UD lens elements provides excellent optical performance interms of resolution and contrast. These features, together with its water-anddust-proof construction, provide both the performance and portability to meetuser demands.