Canon Patents: RF 9-18mm F4, 10-20mm F4 & 11-24mm F4 Ultra-Wide-Angle Lenses

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Canon has filed several new RF mount ultra-wide-angle zoom patents for 9-18mm f/4, 10-20mm f/4 & 11-24mm f/4 Lenses, which are designed for Canon full-frame mirrorless cameras.

[Publication number] P2022065512
[Publication date] APRIL 27, 2022
[Patent application title] Zoom Lens and Imaging Device

Example 1 (9-18mm F4)

Focal length 9.28 13.05 17.45 
F number 4.12 4.12 4.12 
Half angle of view (°) 64.01 58.13 51.11 
Image height 19.04 20.99 21.64 
Lens overall length 130.93 130.93 130.93 
Back focus 16.86 14.84 24.07

Example 2 (11-24mm F4)

Focal length 11.33 16.1 23.42 
F number 4.12 4.12 4.12 
Half angle of view (°) 59.84 52.13 42.73 
Image height 19.5 20.7 21.64 
Lens total length 154.86 154.86 154.86 
Back focus 22 17.55 25.32

Example 3 (10-20mm F4)

Focal length 10.3 14.81 20 
F number 4.12 4.12 4.12 
Half angle of view (°) 62.16 54.43 47.25 
Image height 19.5 20.7 21.64 
Lens overall length 126.84 126.84 126.84 
Back focus 20.24 18.24 32.59

Example 4 (10-20mm F4)

Focal length 10.3 14.8 20 
F number 4.12 4.12 4.12 
Half angle of view (°) 62.16 54.44 47.25 
Image height 19.5 20.7 21.64 
Lens total length 129.57 129.57 129.57 
Back focus 20 16.89 18.38

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