Canon 70-200MM F2.8 L IS USM Lense:

The Canon EF 70-200mm f/2.8L IS USM is a high-performance, telephoto zoom lens dedicated to Canon EOS cameras. It is equipped with an Image Stabilizer to help preventing blurred shots due to camera shake during slow shutter speeds.

In the lens name, “IS” stands for Image Stabilizer, and “USM” for Ultrasonic Motor

This large aperture, super high image quality telephoto zoom lens provides performance comparable to that of a single focal length lens, with a wide zoom range.

This lens is developed as a successor to the EF 80-200mm f/2.8L. Its major features include: a ring USM (Ultrasonic Motor) drive, built-in full-time manual focusing, short minimum focusing distance of 1.5m, high marginal illumination, and compatibility with Extenders EF1.4X and EF2X (extends the zoom range with AF to 98-280mm f/4 or 140-400mm f/5.6 respectively).

Although this is a large aperture telephoto zoom lens, it is equipped with four low refraction/low dispersion UD (Ultra-low Dispersion) glass lens elements (2nd,3rd,11th & 13th) that offer excellent contrast and sharpness. This is a lens that deserves to be known as a super high performance telephoto zoom lens.