Fisheye lenses are known for being both heavily distorted and literally heavy, but a recent patent application suggests that Canon is brainstorming ways to make a better fisheye. The patent details a process of “adding another optical system” to another in order to reduce distortion in a fisheye lens, without increasing the size of the lens system as a whole.
The patent, JP2025-12993, which was published in Japan on January 24, demonstrates the concept of taking one optical system and adding a secondary optical system that can be inserted and removed as needed. When inserted, the patent says, distortion is reduced by as much as 10% than when the second optical system isn’t used.
