The Canon EF 11-24mm f/4L USM is a professional-grade ultra-wide zoom lens, designed to deliver outstanding optical performance for full-frame Canon EF-mount DSLRs. Spanning an impressively wide 11–24mm focal length range, it allows photographers to capture expansive landscapes, interiors, and architectural subjects with stunning perspective control. On APS-C cameras, the lens provides a 17.6–38.4mm equivalent focal length, making it equally versatile for smaller-format users. Its constant f/4 maximum aperture ensures consistent light transmission across the entire zoom range, ideal for maintaining uniform exposures. Inside its advanced construction, one Super Ultra-Low Dispersion element, one UD element, and four aspherical elements work together to reduce chromatic aberrations and distortion, producing sharp, clean imagery from edge to edge. Both Subwavelength Coating (SWC) and Air Sphere Coating (ASC) are applied to suppress flare and ghosting, preserving accurate color and contrast even in backlit or high-glare conditions. Autofocus performance is fast, quiet, and precise thanks to the ring-type Ultrasonic Motor (USM), high-speed CPU, and optimized AF algorithms, while full-time manual focus override ensures refined control. Built for professional reliability, the EF 11-24mm f/4L is sealed against dust and moisture, with protective fluorine coatings applied to its large front element to resist fingerprints and smudges. The design also supports rear insert-type gelatin filters, offering creative flexibility for demanding photographers.Manufacturer Items Include:Canon EF 11-24mm f/4L USM LensCanon Lens Cap for EF 11-24mm f/4L USMCanon Lens Dust Cap E (Rear)Canon LP1424 Lens PouchBundle Items Include:Canon EF 11-24mm f/4L USM LensCanon Mount Adapter EF-EOS RShoulder Bag64GB Memory Card