The RF 800mm IS STM lens is a super telephoto prime lens with 4-stop image stabilisation and a greater reach than its sister lens, the RF 600mm IS STM. It is perfect for the wildlife enthusiast, and ideal for specialist pursuits such as bird and aviation photography. Lightweight, powerful and compact with excellent image stabilisation for handheld shooting, the Diffractive Optic (DO) design, along with the RF lens mount and a fixed, F11 aperture, helps make it a more compact lens and easier to pack into a travel bag. Designed for Canon's Full Frame mirrorless cameras, its RF lens mount offers a faster communication speed than a conventional DSLR. Smooth and silent focusing from the STM motor is a real advantage too, particularly for video.