Canon EF 11-24mm f/4L USM Ultra-Wide Zoom Lens - Bundle with FocusShifter DSLR Follow Focus and Rack Focus, Lens Wrap (19x19), Cleaning Kit, LensPen Cleaner, Lens Cap Tether, Software Package Canon EF 11-24mm f/4L USM Ultra-Wide Zoom Lens - Front Lens Cap - Lens Dust Cap E (Rear) - LP 1424 Lens Case - Canon 1 Year Limited Warranty - Bundle Includes: - FocusShifter DSLR Follow Focus & Rack Focus - Lens Wrap (19x19) - Cleaning Kit - LensPen Cleaner - Universal Lens Cap Tether - Software Package L-series ultra-wide zoom lens with an impressive 11mm starting focal length, delivering high-quality, expressive images New optical design and the use of one Super UD element and one UD lens element helps significantly reduce chromatic aberration Four aspheric lens elements help minimize distortion from the center of the image to the periphery and across the entire zoom range Subwavelength Coating (SWC) and Air Sphere Coating (ASC) help to significantly reduce flare and ghosting