
Canon has recently registered some exciting new designs for Canon RF lenses, including optical systems for a 70-200mm f/4 (full-frame) and an 18-50mm f/4 (APS-C) lens.
The patent application, spotted by Japan's Asobinet, was published on May 29 2025. At first glance, however, one of these lenses looks very familiar – and rings more than just one bell.