Canon EF 100-400mm lens has an Air Sphere Coating. This Canon USM lens is incorporated with one fluorite element.The Canon EF 100-400mm f/4.5-5.6L IS II USM Lens is a part of the esteemed L-series developed for full-frame EOS DSLRs. This lens boasts a sophisticated optical design and advanced image stabilization technologies. Incorporated with one fluorite element and one Super UD element, this lens helps to reduce aberrations and distortions throughout the zoom range. It delivers crisp image quality and sharpness in color. With an Air Sphere Coating, this lens reduces lens flare and ghosting for richer, high-quality images. The four-stop effective Optical Image Stabilizer helps to minimize the appearance of camera shake. All the more, an internal focusing mechanism and ultrasonic motor deliver quick and intuitive handling. It is best suited for handheld shooting. The various attributes make it an ideal pick for sports and wildlife photographers. This lens is packed within a weather-resistant barrel. This lens also boasts fluorine coatings on the front and rear elements for protection against fingerprints and smudges. Click your favorite memories with the use of this excellent Canon EF 100-400mm lens. Physical Features Key Features No. of diaphragm blades: 9 Minimum aperture: 32-38 Maximum magnification (x): 0.31(at 400mm) Filter diameter (mm): 77 Max. diameter x length (mm): 94x193 Superior Performance The Canon EF 100-400mm USM lens is incorporated with one fluorite element and one Super UD element that helps to reduce aberrations and distortions. The four-stop effective Optical Image Stabilizer helps to minimize the appearance of camera shake. It is best suited for handheld shooting. The rotation-type zoom ring offers precise adjustment between zoom positions. For pleasing out-of-focus quality, this lens features nine rounded diaphragm blades. An Air Sphere Coating on this lens reduces lens flare and ghosting for richer, high-quality images. Designed with Perfection The Canon USM lens features a weather-resistant design that protects the lens from moisture and dust. It is suitable to use in harsh weather conditions. All the more, the fluorine coatings on the lens offer further protection from fingerprints and smudging.