Canon EF 800mm f/5,6 L IS USM Specifications

"Incorporating such special optical materials as fluorite and UD (ultra low-dispersion) glass, the new Canon single-focal-length lense effectively correct the chromatic aberrations that can occur in telephoto lenses while realizing high-resolution, high-contrast shooting performance. The super-telephoto EF800mm f/5.6L IS USM effectively meets the demands of users working in such fields as sports, news, and nature photography. Canon L-series lenses are equipped with four AF stop buttons positioned around the front of the lens, enabling photographers to temporarily turn off autofocus to prevent other elements from interfering with focusing, and a circular aperture diaphragm that achieves natural background-blur performance.

This is the longest telephoto lens among Canon´s lineup, and a terrific choice for any long-distance application-outdoor sports, wildlife, news photojournalism, and so on. It´s actually lighter than Canon´s EF 600mm f/4L IS lens, weighing just under 10 lbs. It uses a refined optical design, with two fluorite lens elements, one UD element, and one Super-UD-glass element, for outstanding correction of color fringing and superb contrast and sharpness. This super-telephoto lens uses magnesium-alloy barrel construction to enhance its light weight, and has weather-resistant gaskets throughout for use in harsh conditions. It´s compatible with both the EF 1.4x II and 2x II tele extenders for even more reach: EOS cameras with 45 AF points will continue to provide autofocus at the center AF point when the lens is used with the 1.4x extender. Finally, it´s image stabilized, providing up to 4 stops of correction for camera shake. This makes it even more practical in many situations."