Canon Publishes Patents for 28-400mm F3.5-6.31S and 28-400mm F4-81S Lenses

On October 7th, Canon's patent application P2025147826 was published. It discloses multiple embodiments of an optical system designed for high-magnification zoom lenses such as the 28-400mm F3.5-6.31S and 28-400mm F4-81S.

[Publication Number] P2025147826

[Publication Date] 2025-10-07

[Invention Title] Zoom Lens and Camera Device Equipped with the Zoom Lens

[Application Date] 2024-03-25

[Application Identification Number] 000001007

[Applicant Name] Canon Inc.