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Canon is obviously still doing development on the EF lens mount. As the mount is likely going to live on for both DSLR users as well as cinema applications, as Canon's cinema cameras also come in EF mount. That will likely continue for years to come, as the transition to the RF mount will likely take 5-10 years for mass acceptance.
From US Patent US Patent Application 20190101732:
- Canon EF 16mm f/1.4
- Canon EF 20mm f/1.4
- Canon EF 14mm f/1.8
- Canon EF 16mm f/1.8
- Canon EF 17mm f/1.8
- Canon EF 19mm f/1.8
