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More telephoto zoom lens patents for the RF mount have been uncovered by Canon News. A couple of them look to be “consumer” zoom lenses along with what is likely an L lens in the RF 100-400mm f/3.5-5.6L IS.
Japan Patent Application 2019-020679
Canon RF 100-400mm f/3.5-5.6L IS USM
- Focal distance 102.21 195.97 389.86
- F number 3.83 4.93 5.85
- Half angle of view (degree) 11.95 6.30 3.18
- Image height 21.64 21.64 21.64
- Lens total length 204.85 250.29 291.30
- BF 4.31 31.68 97.49
Canon RF 70-300mm f/4-5.6 IS
- Focal distance 68.25 126.36 288.22
- F number 4.16 4.68 5.83
- a half field angle (degree) — 17.59 9.72 4.29
- Image height 21.64 21.64 21.64
- Whole length of the lens 168.24 189.04 207.81
- BF 12.70 30.65 79.58
Canon RF 50-250mm f/4-5.6 IS
- Focal distance 51.80 126.89 241.22
- F number 4.04 5.18 5.77
- a half field angle (degree) — 22.67 9.68 5.13
- Image height 21.64 21.64 21.64
- Whole length of the lens 136.91 175.70 210.70
- BF 11.36 30.93 42.48
