Canon has filed a Japanese patent for a new RF-mount telephoto zoom lens, the RF 75-300mm f/4.5-5.6, featuring a floating focus design. The patent, published as Japanese Patent Publication No. 2026-1337 on August 20, 2026, outlines an optical system designed for mirrorless cameras, with potential applications in broadcast and compact camera systems. The focal range of 75mm to 300mm equivalent positions it as a versatile telephoto zoom suitable for events, wildlife, and video production.

The patent emphasizes the focusing mechanism rather than optical specifications, highlighting a floating focus design intended to maintain image quality across the zoom range by adjusting internal lens elements during focusing. This approach helps minimize focus breathing and ensures consistent performance, particularly valuable in video work where smooth focus transitions are critical.

While the lens remains in the patent phase and no official product announcement has been made, the filing signals Canon’s continued investment in expanding its RF lens ecosystem. The RF mount, introduced with the EOS R system, has grown to include a wide range of primes and zooms, and this new telephoto option would fill a gap in the mid-telephoto segment for creators seeking lightweight, affordable reach.

For content creators and videographers, a lens like the 75-300mm f/4.5-5.6 could offer a compact, cost-effective solution for telephoto needs without sacrificing the optical benefits of the RF mount. Its potential use in broadcast and compact cameras also suggests Canon may be targeting hybrid workflows where stills and video overlap.

As with all patents, this design may not reach production, but it reflects Canon’s ongoing innovation in lens technology. The company’s responsiveness to creator demands—especially in lightweight, versatile optics—continues to shape its RF lineup, reinforcing its position as a trusted brand in the imaging industry. Creators should monitor official channels for any future developments.