The Canon RF 600mm f11 and RF 800mm f11 IS STM lenses are the first fixed focal length super-telephoto RF lenses and are incredibly compact and lightweight. The two lenses are ideal for bird, wildlife, outdoor sports, and aviation photography or, when you just want to bring those subjects in the distance closer to you. Diffractive Optics technology helps to reduce the necessary number of lenses and greatly diminish the cost of the lenses, making them affordable for a broader group of photographers.
Tony & Chelsea Northrup has tested the Canon RF 600mm f/11 IS STM lens and Canon RF 800mm f/11 IS STM lens with the Canon EOS R5. This is a REAL wildlife photography test since they compared it to their $16,000 wildlife camera & lens kit: the Nikon D850 ($2,996.95) and Nikon AF-S NIKKOR 600mm f/4E FL ED VR lens ($12,296.95).