Canon RF Patents: 70-300mm F4.5-7.2, 100-350mm F5-8 & 250-600mm F6.3-11

Canon has filed several new compact and lightweight zoom lens patents for RF 70-300mm f/4.5-7.2, RF 100-350mm f/5-8, RF 250-600mm f/6.3-11 lenses, which are designed for Canon full-frame mirrorless cameras.

[Publication number] JP-A-2022-178447
[Publication date] 2022.12.2
[Patent application title] Zoom lens and imaging device having the same

Example 1 (100-400mm F6.3-8)

Focal length: 103.01 201.88 387.98 
F number: 6.30 8.24 8.24 
Half angle of view: 11.86 6.12 3.19 
Image height: 21.64 21.64 21.64 
Total lens length: 183.99 229.42 280.32 122.00 122.00 122.00 
Back focus: 7

Example 2 (100-350mm F5-8)

Focal length: 103.01 208.71 347.20 
F number: 5.13 7.06 8.24 
Half angle of view: 11.86 5.92 3.57 
Image height: 21.64 21.64 21.64 
Total lens length: 198.72 238.36 267.39 863.99 863.94 
Back focus: 362.94

Example 3 (70-300mm F4.5-7.2)

Focal length: 70.00 146.89 300.00 
F number: 4.40 6.09 7.20 
Half angle of view: 17.17 8.38 4.12 
Image height: 21.64 21.64 21.64 
Total length of lens: 165.01 196.65 231.62 232.29 232.322 

Example 5 (250-600mm F6.3-11)

Focal length: 250.00 439.53 600.00 
F number: 6.24 9.67 11.33 
Half angle of view: 4.95 2.82 2.07 
Image height: 21.64 21.64 21.64 
Total length of lens: 305.44 320.00 923.07 916.37 336.37 
Back focus: 316.97

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