The Canon RF mount 300mm F2.8 L IS USM lens has entered the testing stage and is expected to be launched in the first half of 2023. It is reported that Canon's new RF 300mm F2.8 L IS USM "Small White Cannon" is lighter and shorter than the EF mount, its weight is 40% lighter than the SLR version, and its length is also 30% shorter.

Last year Canon released two Canon L-class red circle lenses, the RF400mm F2.8 L IS USM and the RF600mm F4 L IS USM. It adopts an optical design of 17 elements in 13 groups, including 2 fluorite and 1 super UD (Super Ultra Low Dispersion) element. Officially, with the RF system, the camera shake correction control has been optimized to achieve a 5.5-level optical image stabilization. The minimum focusing distance of the RF400mm F2.8 L IS USM is about 2.5 meters, and the maximum magnification is about 0.17 times; the minimum focusing distance of the RF600mm F4 L IS USM is about 4.2 meters, and the maximum magnification is about 0.15 times.

On Canon's official website, the RF400mm F2.8 L IS USM is priced at 89,999 yuan, and the RF600mm F4 L IS USM is priced at 99,999 yuan.