The EF 100400mm f/4.55.6L IS II USM is a powerful member of the professional L series and is perfectly suited for passionate sports and nature photographers. As the successor to the very popular EF 100400mm f/4.55.6L IS USM, the model impresses with a number of interesting improvements in terms of image quality and ease of use. It sets different standards in the market segment of compact supertelezoom lenses. The EF 100400mm f/4.55.6L IS USM is an Lseries supertele with optical image stabilizer (IS). Lenses made of fluorite and SuperUD glass ensure the extensive elimination of distortion and aberrations. Internal focusing with sliding elements (floating system) ensures that superior image sharpness is maintained throughout the AF working range. The lens can be used with the EF 1.4x II and EF 2x II extenders. The EF 100400mm f/4.55.6L IS USM features a threestop image stabilizer (IS), making it the ideal lens for handheld shooting. Up to three stops slower shutter speeds than normally possible can be used with it, without increasing the risk of camera shake. Movement in a certain direction is seen by the lens as panning, and the image stabilizer automatically turns off for that direction of movement. A ringshaped ultrasonic motor ensures very fast and extremely quiet focusing. Thanks to excellent holding torque, inaccuracies are avoided. In addition, manual focusing is possible at any time without switching. This means that the focus can be adjusted without having to switch off the AF function. High contrast, low distortion and consistent resolution from the center of the image to the edge are evident throughout the zoom range. A circular aperture, which is electromagnetically controlled, softens and evens out the background and makes the foreground subject stand out more against the attractive background blur.