The photographic lens Canon 70-200mm F4 IS USM – RF-mount, popular for its reach and flexibility, the Canon RF 70-200mm f/4L IS USM is a fresh take on this well-regarded focal length, featuring an impressively sleek and lightweight form factor perfect for their full-frame mirrorless cameras. The constant f/4 maximum aperture strikes a balance between being bright enough for available light shooting while also contributing to the especially portable, handholdable design. Complementing this is an apt Optical Image Stabilizer, which compensates for up to 5 stops of camera shake, or up to an impressive 7.5 stops of shake correction when paired with an EOS R-type body with IBIS. Optically, this lens incorporates four UD elements, which suppress a variety of aberrations throughout the zoom range for high clarity, and an Air Sphere Coating is also featured to reduce flare and ghosting. Balancing the distinguished optical system is a Dual Nano USM focus system, which delivers fast, nearly silent autofocus performance with full-time manual focus override. Additionally, this Canon 70-200mm F4 lens is weather-sealed and has a fluorine coating to protect the front and rear elements. This versatile Canon 70-200mm F4 IS USMCanon 70-200mm F4 IS USM telephoto zoom lens is designed for use with full-frame Canon RF-mount mirrorless cameras.