Canon's recent patent application presents an intriguing development for APS-C sensors. The patent outlines a series of fixed-length zoom lenses that particularly advantageous for video applications.
Canon Rumors recently reported on the new patent, which details three lenses: the RF-S 20-120mm f/4.0, RF-S 20-135mm f/4.0, and RF-S 18-100mm f/4.0. Each lens exhibits a constant total length regardless of the focal length setting as well as a consistent maximum aperture. This design ensures not only stability in handling but also uniformity in lighting and exposure during zooming, which are key requirements for video production.
This patent suggests a potential shift in strategy, possibly indicating Canon's renewed interest in exploring the APS-C format for high-quality video production. A notable aspect of these lenses is the requirement for image stretching at the wider end of the zoom range. This characteristic could introduce unique challenges and possible image quality issues.
While patents often don't lead directly to market products, they offer a fascinating peek into the research and development efforts of companies like Canon. And it is certainly nice to see Canon paying serious attention to the RF-S mount given all the remarkable products we've seen for the RF mount. Hopefully, we'll hear more about these designs soon!
No one wants a F4 aps-c lens.. these won't sell. Canon fail. Especially for a video focused lens.