Canon is set to announce replacements for its flagship RF 400mm f/2.8L IS USM and RF 600mm f/4L IS USM lenses in late Q4, according to sources cited by Canon Rumors. These lenses, part of Canon’s esteemed "big white" super-telephoto lineup, are widely used by professional sports, wildlife, and news photographers. The upcoming updates are expected to maintain Canon’s strong position in the professional RF lens ecosystem, which has grown steadily since the launch of the EOS R system.

In addition to the 400mm and 600mm replacements, sources suggest Canon may also introduce a new 500mm prime lens, potentially filling a gap in its current RF super-telephoto offerings. While no technical specifications or pricing details have been confirmed, the move signals Canon’s continued investment in high-end optics for mirrorless users. The RF mount now includes a broad range of lenses from ultra-wide to super-telephoto, supporting creators across disciplines.

For professional photographers and videographers, lens availability and roadmap clarity are critical when committing to a system. Canon’s refresh of these key telephotos reinforces its commitment to the RF ecosystem, offering creators confidence in long-term support and innovation. The late Q4 timing aligns with traditional product announcement cycles ahead of major winter sports and wildlife shooting seasons.

As Canon expands its RF lens lineup, the company aims to meet the evolving demands of high-resolution imaging and 8K video workflows. These developments underscore Canon’s strategy to strengthen its position in the professional imaging market through both camera bodies and native lens support. Further details are expected as the announcement window approaches.