The Canon RF 35mm f/1.2L USM has been on the RF optics roadmap for a long time, almost since the introduction of the system. And a patent for it, among others, appeared 2 years ago, but the lens was never released.
Now, the Asobinet resource has information about two new patents describing the optical design of lenses, including 1.2 / 35.
Canon 35mm f/1.2
- Focal Length: 33.53mm
- Aperture: F/1.30
- Half FOV: 32.83°
- Image Height: 21.64mm
- Overall length: 61.97mm
- Back focus: 0.29mm
The same patent also shows a fast ultra wide-angle prime lens with the same short back focus distance.
Canon 12mm f/1.2
- Focal Length: 12.40mm
- Aperture: F/1.30
- Half FOV: 32.82°
- Image height: 8.00 mm
- Overall length: 21.76mm
- Back focus: 0.44mm
* * *
In the description of the optical formulas, the f / 1.3 aperture appears, but if they reach real products, they will most likely be rounded up to the usual f / 1.2 or f / 1.4.
Something else is more interesting. If you paid attention, the description gives extremely small back focus values for both lenses (0.29 and 0.44 mm), which casts doubt on the possibility of their use with consumer cameras. Most likely, this is still optics for industrial cameras with a special mechanism for bringing the lens closer to the sensor to the working distance after installation on the camera.
