Sharpness. Stability. Speed. The Canon EF 600mm f/4L IS III USM Lens is a powerful telephoto lens that delivers outstanding image quality and impressive performance in any situation! The Canon EF 600mm f/4L IS III USM Lens is a high-performance super telephoto lens that is perfect for sports and wildlife applications. With its advanced, lightweight design, quick and easy handling , and high speed performance, this lens is sure to be a cherished addition to your camera gear. The quick and precise autofocus system ensures you can always get the shot you want, while the durable construction can withstand the rigors of travel and outdoor photography. Featuring a new optical design with 27 elements in 20 groups , this lens delivers superb image quality with minimal chromatic aberration and distortion. Using fluorite, Super UD, and aspherical elements , both chromatic and spherical aberrations are kept to minimum in order to realize sharp, clear image quality with accurate rendering and color fidelity. The advanced optical design includes Super Spectra and Air Sphere Coatings to reduce ghosting and flare, while the advanced AF system delivers quick and accurate focus tracking. Additionally, the Canon EF 600mm f/4L IS III USM Lens features Ultra Sonic Motor (USM) technology for fast and silent autofocusing, making it an ideal choice for capturing those once-in-a-lifetime moments. A 9-blade diaphragm also contributes to beautiful bokeh for stunning background blur. A powerful Image Stabilization system offers up to 5 stops of shake correction for sharp images, even in low light or when shooting handheld. And, a ultrasonic motor provides fast and accurate autofocus, while full-time manual focus override lets you make fine adjustments with ease. Additionally, this lens is weather-sealed for use in trying environmental conditions - so you can take it with you on all your adventures. Plus, it has a removable rotating tripod collar to benefit working atop a tripod or monopod