Canon - 11-24mm f/4L
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Canon ef lens EF11 24mm f 4L USM ENG ULTRASONIC Instructions Thank you for purchasing a Canon product Canon s EF11 24mm f 4L USM is a high performance ultra wide angle zoom lens for use with EOS cameras USM stands for Ultrasonic Motor Features 1 Use of super UD lens elements UD lens elements and two types of aspherical lens elements giving superior definition 2 SWC Subwavelength Structure Coating and ASC Air Sphere Coating are utilized to significantly reduce occurrences of flare and ghost created by quite large incident angles of light 3 Using a fluorine coating on the foremost and rearmost lens surfaces allows adhered dirt to be removed more easily than before 4 Ultrasonic motor USM for fast quiet autofocus ...