The world’s lightest*¹ super-telephoto lens (approx. 1,260g) with a fixed f/11 aperture, makes telephoto shooting at 800mm much more accessible to photographers. The RF800mm f/11 IS STM optical system features DO lenses with aspherical lens characteristics and a chromatic aberration correction feature. The lens suppresses chromatic aberration and other aberrations that tend to occur with telephoto lenses, to achieve high image quality.

The lens has a retractable structure which extends when shooting but, when retracted, is 70mm shorter and easy to carry in a camera bag. The lightweight design includes extensive use of strong plastic materials. The image stabilization feature is as effective at suppressing camera-shake as a 5-stop increase in shutter speed*².

^*1 Refers to autofocus-compatible lenses for interchangeable-lens cameras (SLR cameras and mirrorless cameras) with a focal length of 800mm. As of July 8, 2020, based on internal Canon survey.
^*2 When used with EOS R camera. Based on CIPA standards. Effective in the yaw and pitch directions only.