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A new patent showing off some lens element coating to help with ghosting and other anomalies has appeared alongside optical formulas for what appears to be RF-S prime lenses.
Below are the three prime lens designs shown in the patent, we wouldn't be surprised for one of these to hit the market as a consumer product.
Canon RF-S 21mm f/1.8
- Focal length: 20.60mm
- F-value: 1.85
- Half angle of view: 46.4°
- Image height: 18.71mm
- Overall length: 84.87mm
- Back focus: 11.00mm
Canon RF-S 24mm f/1.8
- Focal length: 24,72mm
- F-value: 1.85
- Half angle of view: 41.2°
- Image height: 19.34mm
- Total length: 81.00mm
- Back focus: 11.00mm
Canon RF-S 28mm f/1.8
- Focal length: 28.60mm
- F-value: 1.85
- Half angle of view: 37,1°
- Image height: 20.15mm
- Total length: 81.00mm
- Back focus: 13.20mm
