Canon Patent Application for 800mm f/5.6 lens

A Canon patent application (2018-087965) for what might be the future replacement for the Canon EF 800mm f/5.6L IS lens.

The patent literature describes a lens concept where weight and size are reduced without affecting optical performance or causing increased chromatic aberrations.

Machine translated patent literature excerpt:

The method of using for a part of imaging optical system the diffracted-light faculty which has a diffraction working effect as a method of reducing lens weight is known correcting satisfactorily several aberration including the chromatic aberration of the imaging optical system. The imaging optical system which constituted the front lens group from ** material whose refractive index is higher than a low dispersing material with abnormal portion dispersibility, such as fluorite, and attained size and weight reduction of the whole system is known, using a diffraction working effect and reducing the lens number of sheets of the front lens group which was conventionally required for aberration compensation

There is a lot of buzz around Canon patent applications as of lately, and a lot of misunderstanding too. Bear in mind that a patent application does not mean a company will launch a product anytime soon. A patent application is a way companies have to secure their research and their intellectual property. In this sense, nothing here is a guarantee that the EF 800mm f/5.6L lens will be replaced in the close future.

Some Canon patent applications we think might get into production in the next few years are these:

• Patent application describing how to improve burst rate by compressing raw files
• Patent application describing a new way to review photos from a sequential shot
• Patent application that describes technology to improve wireless communication while reducing power consumption
• Patent application to spot and reduce moire artefacts in image data
• Patent application for weather sealed lens adapter