L-series ultra-wide zoom lens with an impressive 11mm starting focal length. Focal Length & Maximum Aperture: 1124mm f/4, Closest Focusing Distance: 11 in. / 0.28m. New optical design and the use of one Super UD element and one UD lens element. Subwavelength Coating (SWC) and Air Sphere Coating (ASC), Inner focusing, ring USM, a high-speed CPU and optimized AF algorithms. Full-time manual focus allows manual focus adjustment while in AF Mode