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A spectacular professional lens, combining the virtues of the legendary EF 70-200mm f/2.8L USM with the Canon’s newest Image Stabilizer technology. The IS system now offers up to a three-stop improvement in hand-held ability, responds faster than ever before, and functions on a solid tripod. Additional improvements include faster AF response and tracking speed, weather-resistant construction, and the entirely new optical system focuses even closer (to 4.6 feet /1.4m) than the non-IS version.