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Canon News uncovered a patent showing some very strange optical formulas, they're strange because of the back focus distance. The optical formulas in this patent have back focus distances of 0mm to 2mm.
The EF mount has a back focus distance of around 44mm, while the RF mount is much closer at 18mm.
I have a hard time believing Canon is going to get into the fixed-lens full-frame camera segment, but hey… I'd love that. :)
Canon 50mm f/1.2 (Full Frame)
- Focal length: 51.50mm
- F-number: 1.24
- Half angle of view: 22.79°
- Image height: 21.64mm
- Total lens length: 78.83mm
- BF: 0.50mm
Canon 50mm f/1.6 (Full Frame)
- Focal lengt:h 49.17mm
- F-number: 1.65
- Half angle of view: 23.75°
- Image height: 21.64mm
- Total lens length: 72.35mm
- BF: 2.35mm
Canon 50mm f/1.2 (Full Frame)
- Focal length: 51.50mm
- F-number: 1.24
- Half angle of view: 22.79°
- Image height: 21.64mm
- Lens total length: 78.00mm
- BF: 1.00mm
Canon 35mm f/1.4 (Full Frame)
- Focal length: 36.00mm
- F-number: 1.45
- Half angle of view: 31.00°
- Image height: 21.64mm
- Total lens length: 106.48mm
- BF: 0.00mm
