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Canon Patent Application: More Fast RF VCM Primes
RF 20mm F1.4 VCM, 21mm F1.4 VCM, 28mm F1.4 VCM
This patent application (2025-015010) shows the real production version of the RF 24mm f/1.4L VCM.
However, other embodiments may emerge in the future. Interestingly, the same overall optical element design was used for the RF 35mm f/1.4L VCM, but it does not appear to be an actual embodiment.
Canon has never had "L" lenses in the 20, 28 or 21mm focal lengths, but they are popular with other brands and OEMs.
This patent application mentions that they wanted to make the lens with less focus breathing, which would certainly be advantageous for video-related hybrid lenses.
To provide an optical system that is compact yet has high optical performance by suppressing aberrations and fluctuations in the angle of view that occur during focusing.
Canon RF 20mm F1.4L VCM
| Focal Length |
20.63 |
| F-Number |
1.46 |
| Angle of View |
42.73 |
| Lens Length |
112.63 |
| Back Focus Distance |
15.44 |
Canon RF 28mm f/1.4L VCM
| Focal Length |
28.80 |
| F-Number |
1.46 |
| Angle of View |
33.89 |
| Lens Length |
119.74 |
| Back Focus Distance |
14.63 |
Canon 24mm f/1.4L VCM
This embodiment shows the actual production version of the RF 24mm f/1.4L VCM lens. We show the actual element composition from Canon as compared to the embodiment element composition. While there are some slight positional changes, it's the same lens.
| Focal Length |
24.72 |
| F-Number |
1.46 |
| Angle of View |
37.14 |
| Lens Length |
118.17 |
| Back Focus Distance |
15.18 |
Canon RF 21mm f/1.4L VCM
| Focal Length |
21.22 |
| F-Number |
1.46 |
| Angle of View |
41.03 |
| Lens Length |
120.82 |
| Back Focus Distance |
21.77 |
Canon 28mm f/1.4L VCM
| Focal Length |
27.52 |
| F-Number |
1.46 |
| Angle of View |
34.12 |
| Lens Length |
121.21 |
| Back Focus Distance |
12.63 |
Canon 28mm f/1.4L VCM
| Focal Length |
28.79 |
| F-Number |
1.46 |
| Angle of View |
32.90 |
| Lens Length |
128.09 |
| Back Focus Distance |
13.86 |
This is a Patent Application Only
As with all patent applications, this is a look into Canon’s research and potential future development. While we know this patent application did show embodiments that made it into an actual release, other embodiments may or may not make it into actual products.