Canon Patents Innovative 70-200mm f/2 Zoom Lens Design
Canon has filed a patent application in Japan for a 70-200mm f/2 lens design, marking a notable development in zoom lens technology.
Canon's New Patent Application
Canon has filed a patent application in Japan for a 70-200mm f/2 lens design, marking a notable development in zoom lens technology. Published on October 16, 2026, this application details a complete optical design that is a new design for Canon.
Optical Design Specifications
The patent, identified as JP 2026-168807, includes 11 examples of various lens designs. Among these, Example 9 features a focal length range of approximately 71.65mm to 194mm, maintaining an aperture of f/2.06. This design requires a front element diameter of 94.17mm and utilizes a total of 23 lens elements, including six aspherical surfaces and eight lens groups. The internal zoom mechanism is designed to keep the lens compact, measuring 240.16mm in length across its zoom range.
Focusing Mechanism
Focusing in this lens design is achieved through the movement of three separate lens groups. The design incorporates a positive front group that bends incoming light inward, which helps maintain a smaller overall lens size. Additionally, a negative lens element is strategically positioned to prevent spherical aberration from shifting during focusing adjustments.
Comparison to Existing Models
For context, the current Canon RF 70-200mm f/2.8L IS USM Z lens measures 199mm in length and weighs 1,115 grams. The last Canon lens to offer an f/2 aperture at 200mm was the EF 200mm f/2L IS USM, a prime lens introduced in 2008 that weighs 2,520 grams. In comparison, Canon's existing f/2 zoom, the RF 28-70mm f/2L USM, weighs 1,430 grams and was released in 2018.
Potential Market Impact
While the patent showcases Canon's innovative approach to lens design, it is important to note that Canon publishes numerous optical designs that do not necessarily make it to market. Canon Rumors suggests that the likelihood of this 70-200mm f/2 lens being produced is very low, with an estimated retail price of $6,000 to $8,000 if it were to be manufactured.
Conclusion
This patent application highlights Canon's ongoing efforts to advance zoom lens technology for full-frame cameras. While the practical availability of the 70-200mm f/2 lens remains uncertain, the detailed design provides insight into the company's future optical developments.
