Canon EF 100–400mm f/4.5–5.6L IS USM II is designed for sports, wildlife, and fast-moving subjects, featuring a 4-stop image stabilization system. When used on APS-C cameras, it provides an angle of view equivalent to 160–640mm on full frame. The optical design includes 21 elements in 16 groups, with fluorite and UD elements for high contrast and sharpness. Air Sphere Coating (ASC) reduces flare, ghosting, and contrast loss when shooting into light by using a nano air-layer structure to suppress internal reflections. The IS system offers three modes and allows handheld shooting at shutter speeds up to four stops slower than usual. A zoom torque adjustment ring lets the user customize zoom resistance. Ring-type USM autofocus is fast, precise, and nearly silent. Included: Canon EF 100–400mm f/4.5–5.6L IS USM II lens, front and rear caps, hood, protective filter, pouch.