Canon expands its range of professional lenses for RF mount with the two new super telephoto lenses RF 800mm F5.6 L IS USM and RF 1200mm F8 L IS USM for sports, nature and reportage. According to Canon, the 1200mm tele represents the longest focal length of an autofocus lens for mirrorless cameras. At the same time, it is also said to be the smallest lens of its focal length ever introduced. At about 3.34 kg, it weighs only one-fifth of its "predecessor" EF 1200mm f/5.6 L USM, making it more than 13 kg lighter and 30 cm shorter. The RF 800mm F5.6 L IS USM is also lighter than its EF-mount counterpart thanks to its redesign, and at just over 3.1 kg, it is the lightest and shortest 800mm lens in Canon's L-series.
Furthermore, Canon has managed to reduce the closest focusing distance to 2.6m for the RF 800mm F5.6 L IS USM, while it is also a low 4.3m for the RF 1200mm F8 L IS USM. Both super-telephoto lenses are said to work particularly well with the EOS R3's autofocus system. With AF drive via ring USM, dual focus drive, high-speed CPU and optimized AF algorithms, these lenses are said to have fast yet quiet autofocus, such as for shooting fast-moving wildlife in the wild. Configurable AF stop buttons are found on the lens barrel.
The RF 800mm F5.6 L IS USM's optical image stabilization is said to allow an advantage of up to 4.5 stops to reduce camera shake and enable sharp shots, while the RF 1200mm F8 L IS USM compensates for shake of up to four stops. On both models, the 9-blade iris diaphragm can be adjusted in 1/8 increments.
The Supertele lenses feature Fluorite, Super-UD glass and UD elements and are said to offer excellent chromatic aberration correction, ASC coatings complement the optimized optical design to minimize lens reflections and flare. Dust and splash protection is provided, as is a highly reflective heat shield coating. Furthermore, the front lens is fluorine coated (against grease, water or dust).
In combination with the EXTENDER RF 1.4x or EXTENDER RF 2x, the focal length is extended again accordingly, autofocus and image stabilization are still available.
Starting in May 2022, the Canon RF 800mm F5.6 L IS USM and RF 1200mm F8 L IS USM should be available for ,999 and ,999, respectively (a Euro price is not yet given by Canon).