Component for: SLR Telephoto lens White Lens structure (elements/groups): 23/19 Maximum aperture number: 32 Closest focusing distance: 1.2 m Auto focus Manual focus The EF 70-200mm f/2.8L IS II USM is the professional photographersworkhorse telephoto zoom lens. Using Fluorite to improve image quality, it has a rugged durable design and 4-stop Image Stabilizer- High performance, L series telephoto zoom lens- f/2.8 aperture for low light performance- 4 stop Image Stabilizer- Fluorite and UD lens elements- Improved durability- 1.2m minimum focussing- Water and dust resistant- 8 blade aperture- Ring type USM AF motor.The essential lens for sports, wildlife or portraitsL series QualityAs the most popular lens of many professional photographers, the EF 70-200mm f/2.8L IS II USM matches Canon's highest standards of L-series optics, build quality, reliability and operability. An improved robust construction includes dust and moisture resistant seals to protect against harshest weather condit