Canon continues to push forward with a Canon RF 35mm f/1.2L and RF 24mm f/1.2L

In this patent application (2026-013481), Canon has several interesting embodiments that we will explore here. These embodiments look very much like something I'd expect to see in a production halo RF 35mm f/1.2 prime. Lots of elements and dual focus groups to maximize the speed of focus, and also assist in eliminating any focus breathing that may occur.

However, there is one problem with all the lenses, sans the slower 24mm f/1.8 design, that they all have incredibly short back focus distances that make me wonder if these lenses would work well on the RF Mount.

As you are aware, the RF mount flange sits 20mm in front of the sensor. These 35mm designs would sit “in” approximately 9mm or 11mm away from the sensor. Elements that protrude that far, also have to have some form of shrouding to prevent accidental damage, usually making the entire lens assembly sit even further back.

This doesn't seem to give enough room from the sensor to the rear element, but I do know I've seen production designs sit up to 7mm into the mount, so perhaps there's room there.

That all being said, this is another look at a 35mm f/1.2 design and also a 24mm f/1.2, so it's certainly looking like Canon is actively researching the focal lengths and aperture combination.

Canon RF 35mm f/1.2L

This is a complex 35mm design worthy of the L monikor, featuring dual focus groups, a full image circle projection. The lens is relatively compact at around 124mm in total length. The lens seems to be very center weighted, so it will feel heavy.

Canon RF 24mm f/1.2L

In a design similar to the 35mm, this is an RF 24mm f/1.2 design, with dual focus groups, and it sits 11mm in front of the sensor, or 9mm inside the flange distance. It as well, projects a full image circle

Just a Reminder!

With all patents and patent applications, I have to stress constantly – this is simply a look into Canon’s research; the only thing we can quantify accurately is that Canon is researching this. A patent application doesn’t mean they are going to release this in the next month, or even year, or even at all.