Canon RF Patents: 18mm f/1.8, 20mm f/1.4, 21mm f/1.8, 24mm f/1.8, 28mm f/1.8 Lenses

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Canon has filed several new RF mount wide-angle prime lens patents for the Canon full frame mirrorless cameras.

[Publication number] JP 2021-193406(P2021-193406A)
[Publication date] December 23, 2021
[Patent application title] Optical system and imaging device

Embodiment 1
Focal length (mm): 18.54
F number: 1.85
Half angle of view (degree): 49.41
Image height (mm): 21.64
Lens length (mm): 107.66
Back focus (mm): 14.09

Embodiment 2
Focal length (mm): 23.83
F number: 1.85
Half angle of view (degree): 42.24
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 15.90

Embodiment 3
Focal length (mm): 24.65
F number: 1.85
Half angle of view (degree): 41.27
Image height (mm): 21.64
Lens length (mm): 102.66
Back focus (mm): 14.91

Embodiment 4
Focal length (mm): 20.48
F number: 1.44
Half angle of view (degree): 46.56
Image height (mm): 21.64
Lens length (mm): 124.66
Back focus (mm): 13.16

Embodiment 5
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 105.66
Back focus (mm): 14.88

Embodiment 6
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 13.88

Embodiment 7
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 13.82

Embodiment 8
Focal length (mm): 28.08
F number: 1.85
Half angle of view (degree): 37.61
Image height (mm): 21.64
Lens length (mm): 92.66
Back focus (mm): 12.16

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