The RF1200mm F8 L IS USM super-telephoto, fixed focal length lens is the longest telephoto lens among Canon's EOS R System lineup, as of February 2022. Its compatibility with both RF1.4x and RF2x Extenders increase your effective focal length to a staggering 1680mm and 2400mm, making it a terrific choice for any long-distance application such as outdoor sports, wildlife, news photojournalism, and more where you want to create super-tele impact. Two large-diameter Fluorite elements, one Super UD (Ultra-low Dispersion) and one UD-glass element, and Air Sphere Coating combine for superb optical performance. The 1200mm focal length naturally provides incredibly soft backgrounds. Finally, it's image stabilized, providing up to 4 stops of optical correction for camera shake. At 7.4 lbs., the RF1200mm F8 L IS USM is surprisingly lightweight, giving it incredible handling ease along with its powerful super-telephoto capabilities.