Experience the Excellence: Canon Ef-s Lens SeriesThe innovation in lens design is evident with Canon's Ef-s lenses, tailored exclusively for Aps-c imaging sensors in models such as the Eos 20D and Digital Rebel. By adjusting the distance from the lens's rear to the focal plane and tailoring the image circle size, these lenses offer reduced size, cost, and weight. Yet, they deliver astonishing resolution and contrast across focal lengths.Optimized Wide-Angle Mastery: Ef-s 10-22 3.5/4.5 UsmDive into the world of ultra wide-angle photography with the Ef-s 10-22mm f/3.5-4.5 Usm. A dream for Eos 20D and Digital Rebel users, this lens gives an equivalent field of view of a 16-35mm zoom on traditional 35mm film cameras. This lens is a masterpiece that has been meticulously designed for digital Slrs, delivering exceptional performance. Its distinction stands out as it possesses the shortest minimum focal length for interchangeable lens digital Slrs with Aps-c image sensors, excluding fisheye lenses.Pioneering Lens ConstructionPhotographers can trust this lens to provide exceptional image quality throughout its zoom range. With its 3 Aspherical elements and 1 Super-ud element nestled within a 13-element optical formula, this lens promises precision. The ring-type ultrasonic focusing motor (USM) ensures both rapid and whisper-quiet autofocus, with the luxury of full-time manual focus. Dive deep into your subjects with its 9.5-inch minimum focusing distance.Compact Elegance with Powerful PerformanceDespite its capabilities, the Ef-s 10-22mm f/3.5-4.5 USM is both light and compact. Measuring a mere 3.5 inches in length and weighing 13.6 oz, it's convenient for on-the-go photography. It accommodates 77mm filters and can be complemented with an optional bayonet-mount lens hood.Compatibility Note:Only suitable for Eos 20D, Eos 30D, Eos 40D, Eos 50D, D7, and all Eos Rebel and Eos Digital Rebel models equipped with Aps-c sized sensors. This lens is not compatible with 35mm film SLR cameras or 35mm size ""full-frame"" digital cameras such as the 1Ds or Kodak Pro SLR/c..