Canon RF Patents: 70-300mm F4-7.2 IS, 100-350mm F5.6-8 IS & 250-600mm F7.5-11 IS Lenses

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Canon has filed several new compact and lightweight zoom lens patents for RF 70-300mm F4-7.2 IS, RF 100-350mm F5.6-8 IS and RF 250-600mm F7.5-11 IS USM lenses, which are designed for Canon full-frame mirrorless cameras.

[Publication number] P2022106468
[Publication date] July 20, 2022
[Patent application title] A zoom lens, an image pickup device having the same, and an image pickup system.

Example 2 (100-350mm F5.6-8 IS)

Zoom ratio 3.50 
Focal length 100.00 187.86 350.00 
F number 5.77 7.05 8.24 
Half angle of view (degrees) 12.21 6.57 3.54 
Image height 21.64 21.64 21.64 
Lens overall length 191.67 234.47 267.58 
Back focus 53.64 82.65 117.62

Example 3 (70-300mm F4-7.2 IS)

Zoom ratio 4.29 
Focal length 70.00 149.64 300.00 
F number 4.20 6.04 7.20 
Half angle of view (degrees) 17.17 8.23 ​​4.12 
Image height 21.64 21.64 21.64 
Lens total length 170.19 199.65 232.45 
Back focus 23.56 62.47 105.22

Example 5 (250-600mm F7.5-11 IS)

Zoom ratio 2.40 
Focal length 250.00 415.97 600.00 
F number 7.49 9.70 11.33 
Half angle of view (degrees) 4.95 2.98 2.07 
Image height 21.64 21.64 21.64 
Lens total length 301.60 319.38 339.18 
Back focus 70.61 115.58 165.65

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