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Canon News has uncovered an interesting optical formula patent for a small prime lens with image stabilization. The patent talks in-depth about making small prime lenses with IS.
There are two different embodiments for a Canon RF 19mm f/2.8 IS.
Canon RF 19mm F2.8 IS
- Focal length 19.50mm
- F-number 2.88
- Half angle (degree) 47.99°
- Image height 21.65mm
- Lens total length 96.33mm
- BF 18.34mm
Canon RF 19mm F2.8 IS
- Focal distance 19.29mm
- F-number 2.86
- Half angle (degree) 48.30°
- Image height 21.65mm
- Lens total length 96.59mm
- BF 18.43mm
This patent also includes an optical formula for an RF 85mm f/1.8, but I think it's safe to assume that this won't become a consumer product since we have the Canon RF 85mm f/2 IS STM.
