Canon EF 70-200mm f/2.8L is III USM Lens for Canon Digital SLR Cameras
Constant f/2.8 Maximum Aperture throughout Entire Zoom Range.
Canon’s Air Sphere Coating (ASC) Minimizes Ghosting and Flare.
Optical Image Stabilization at up to 3.5 Stops* of Shake Correction.
Fluorine Coating on Front and Rear Elements to Help Reduce Smears and Fingerprints.
Highly Resistant to Dust and Water, and Improved Durability Even in Harsh Conditions. Inner Focusing System with Ring Ultrasonic Motor. Full-time Manual Focus. One Fluorite Element and Five UD Elements for High Image Quality. Minimum Focusing Distance of 3.9 ft./1.2m.