Canon EF 70-200mm f/2.8 L IS III USMOne of the most versatile lenses available, the EF 70 200mm f 2. 8L IS III USM from Canon is an L series telephoto zoom distinguished by its bright design and advanced optics. Ideal for a variety of subjects ranging from portraiture to sports, the fast constant f 2. 8 maximum aperture excels in difficult lighting conditions and also offers increased control over depth of field for isolating subjects. The optical layout makes use of one fluorite