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Canon News has uncovered a patent for a new RF mount optical formula, this patent shows an RF 17-70mm f/3.5-5.6 in various forms. This looks like some kind of wide kit style lens because of the variable aperture.
Below are the three embodiments:
Canon RF 17-70mm f/3.5-5.6
- Focal length: 17.40mm 35.02mm 68.69mm
- F-numbe:r 3.57 4.18 5.85
- Half field angle: 51.19° 31.71° 17.48°
- Image height: 21.64mm 21.64mm 21.64mm
- Total lens length: 149.59mm 133.68mm 150.50mm
- BF: 13.43mm27.63mm 57.99mm
Canon RF 17-70mm f/3.5-5.6
- Focal length: 17.10mm 34.82mm 72.70mm
- F numbe:r 3.57 4.18 5.85
- Half angle of view: 51.68° 31.85° 16.57°
- Image height: 21.64mm 21.64mm 21.64mm
- Total lens length: 151.00mm 135.57mm 157.71mm
- BF: 13.13mm 27.81mm 63.49mm
Canon RF 18-80mm f/3.5-5.6
- Focal length: 18.70mm 37.55mm 77.50mm
- F-number: 3.57 4.18 5.85
- Half angle of view: 49.16° 29.95° 15.60°
- Image height: 21.64mm 21.64mm 21.64mm
- Total lens length: 146.50mm 128.90mm 147.50mm
- BF: 15.19mm 27.72mm 59.84mm
