Canon EF 600mm f/4L IS III USM Lens

Features: EF-Mount Lens/Full-Frame Format Aperture Range: f/4 to f/32 Super UD, Fluorite & Aspherical Elements Super Spectra and Air Sphere Coatings Ring-Type Ultrasonic Motor AF System Customizable Electronic Focusing Ring Optical Image Stabilizer Weather-Sealed Design, Fluorine Coating Detachable, Rotatable Tripod Collar Rounded 9-Blade Diaphragm The EF 600mm f/4L IS III USM is a Canon L-series super telephoto lens distinguished by its advanced, lightweight design, quick and intuitive handling, and high-speed performance. Using fluorite, Super UD, and aspherical elements, both chromatic and spherical aberrations are kept to a minimum in order to realize sharp, clear image quality with accurate rendering and color fidelity. Both Super Spectra and Air Sphere Coatings also contribute to color accuracy and help to control flare and ghosting when working in backlit and harsh lighting conditions. In addition to its optical merits, the 600mm f/4 is also characterized by its advanced