Patents were found for the Canon 300mm f/2.8 IS, Canon 400mm f/2.8 IS, and Canon 500mm f/4 IS lenses. overview [Publication number] P2025114982 [Release date] 2025-08-06 [Title of Invention] Optical system and imaging device having the same [Application date] 2024-01-25 [Applicant] [Identification number] 000001007 [Name] Canon Inc. To provide an optical system that has high … Continue reading Canon Patent For 300mm F2.8 IS, 400mm F2.8 IS, and 500mm F4 IS Found