EF 800mm f/5.6L IS USM incorporates the latest generation of Canon's Image Stabilizer that offers stabilization performance equivalent to a shutter speed four-stop faster. It gives photographers an enormous advantage for handheld shooting even at 800mm. Its state-of-the-art optical system consists of 2 large diameter fluorite lens elements as well as Super UD and UD lens elements, achieving not only excellent chromatic aberration correction for high-resolution, high-contrast shooting performance, but also a length virtually the same as EF 600mm f/4L IS USM. By utilizing lightweight yet durable magnesium alloy lens barrel with enhanced resistance to water droplets and dust, EF 800mm f/5.6L IS USM weights only 4,500g, 16% lighter than EF 600mm f/4L IS USM.
EF 800mm f/5.6L IS USM is well-suited for a wide variety of long-range photo applications such as wildlife and nature photography as well as sports and documentary photojournalism.