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Canon continues to patent optical formulas for fast RF mount prime lenses. This patent deals with limiting aberration fluctuation when focusing.
Canon is currently missing RF L prime lenses wider than 50mm (I'm not counting the RF 5.2mm f/2.8 Dual Lens Fisheye), and I expect that to change relatively soon.
Canon RF 18mm f/1.8
- Focal length: 18.54mm
- F-number: 1.85
- Half angle of view (°): 49.41°
- Image height: 21.64mm
- Lens total length: 107.66mm
- BF: 14.09mm
Canon RF 24mm f/1.8
- Focal length: 23.83mm
- F-number: 1.85
- Half angle of view (°): 42.24°
- Image height: 21.64mm
- Lens total length: 104.66mm
- BF: 15.90mm
Canon RF 20mm f/1.8
- Focal length: 20.48mm
- F-number: 1.44
- Half angle of view (°): 46.56°
- Image height: 21.64mm
- Lens total length: 124.66mm
- BF: 13.16mm
Canon RF 28mm f/1.8
- Focal length: 28.08mm
- F-number: 1.85
- Half angle of view (°): 37.61°
- Image height: 21.64mm
- Lens total length: 92.66mm
- BF: 12.16mm
