Patents were found for a Canon 28mm F1.2 and 35mm F1.4, which you can read below: overview [Publication number] P2025109405 [Release date] 2025-07-25 [Application date] 2024-01-12 [Applicant] [Identification number] 000001007 [Name or company name] Canon Inc. To suppress breathing and fluctuations in optical performance during focusing. [Background Art] [0002] When a focus lens group is […]