Canon has been designing and releasing some crazy lenses lately, and it seems they have no intention of slowing down, with a 135mm f/1.4 lens popping up in a recent patent application.
The Canon 135mm f/2L is an absolute gem of a lens (and I consider it probably Canon's best kept secret), but it is definitely getting a bit long in the tooth as it nears 25 years of service. Since then, Canon has introduced a new lens mount with exciting new features, and they have been pushing the limits of optical design. It seems they have no intention of slowing down, with Canon Rumors reporting on the recent uncovering of a patent for an RF 135mm f/1.4 lens by Canon News.
Currently, the longest focal length with a maximum aperture of f/1.4 is 105mm, a title shared by both Nikon's AF-S NIKKOR 105mm f/1.4E ED and Sigma's 105mm f/1.4 DG HSM Art, so a 135mm f/1.4 lens would be quite a leap beyond current standards and would certainly be a rather unique portraiture lens that would make a lot of bokeh fanatics excited. It is important to remember that companies file patents for extreme designs all the time, and often, we never see these make it to the market, but in this case, I would not be surprised to see an RF 135mm f/1.4 eventually find its way into stores.