The RF1200mm F8 L IS USM super-telephoto, fixed focal length lens is the longest telephoto lens among Canon's EOS R System lineup**, 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. Its compatibility with both RF1.4x and RF2x Extenders increases your effective focal length to a staggering 1680mm and 2400mm. 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.