Patents were found for a Canon 70-200mm f/4 IS and APS-C Canon 18-50mm f/4 IS which you can read below: overview [Publication number] P2025082363 [Release date] 2025-05-29 [Name of invention] Zoom lens and imaging device [Application date] 2023-11-17 [Applicant] [Identification number] 000001007 [Name or company name] Canon Inc. A small and lightweight positive lead type […]