Here is a new Canon patent application, as usual for RF-mount lenses. Canon patent application…
Canon Patent: RF 50mm f/1.4 and RF 35mm f/1.4 Lenses For EOS R
Image from the patent literature
Another Canon patent dealing with lenses for the RF mount, i.e. for Canon’s full frame mirrorless system EOS R.
Canon patent application 2020-181071 (Japan) discusses optical formulas for an RF 50mm F1.4 and an RF 35mm f/1.4 lens. This patent application is particularly interesting since 50mm f/1.4 and 35mm f/1.4 are two very classic lenses for a full frame system.
The patent application seems to reveal a modern and complex optical design with front and rear lenses for optical correction. Moreover, we think it has internal focusing, a small size and a very fast auto-focus. Another two lenses that might go into production.
| Example 1 | Example 2 | Example 3 | |
|---|---|---|---|
| Focal length | 51.50 | 48.47 | 48.49 |
| F value | 1.45 | 1.45 | 1.85 |
| Half angle of view | 22.79 | 24.05 | 24.04 |
| Image height | 21.64 | 21.64 | 21.64 |
| full length | 95.19 | 108.84 | 91.98 |
| BF | 11.49 | 11.39 | 11.48 |
| Example 4 | Example 5 | ||
| Focal length | 48.49 | 33.99 | |
| F value | 1.45 | 1.45 | |
| Half angle of view | 24.04 | 32.48 | |
| Image height | 21.64 | 21.64 | |
| full length | 116.56 | 131.16 | |
| BF | 13.23 | 12.05 |
More Canon patent applications are listed here.
[via asobinet.com]
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