Canon's EOS R system has arrived to predictably mixed reviews, but I have to say I've been rather impressed by the lenses so far, which seem to be pushing boundaries, such as the RF 28-70mm f/2L USM lens. And while a full frame f/2 zoom lens of that focal length is impressive, it's nothing compared to what these patents show Canon working on.
Canon Rumors and Canon News uncovered a patent application by Canon for some future lenses for their mirrorless line, and what it contains is nothing short of groundbreaking should it ever reach the hands of consumers. The application details an RF 14-21mm f/1.4L zoom lens, something that's simply unheard of. At present, there's the Sigma 14mm f/1.8 Art lens, but that's a prime lens that's also two-thirds of a stop slower. The application also details an RF 16-35mm f/2.8L, a much more more standard lens, but there's also mention of a RF 12-20mm f/2L lens, another extreme piece of glass.
Now, it's important to remember that companies file patents for cameras and lenses that never make it to market all the time, but the fact that Canon is even putting research and development time and money into such insane lenses seems to be a good sign for its mirrorless line. Of course, what such lenses would cost is an entirely different discussion.