Patent of 300mm f/4 IS, 24mm f/2.8, 50mm f/1.3 lenses

patent 300mm f4

Canon has just filed three new patents: Canon 300mm F4 IS, Canon 24mm F1.8 and Canon 50mm F1.3 lens. 

canon 24mm F2.8Canon 50mm f1.3

Canon 24mm F2.8                                               Canon 50mm F1.3

Patent Publication No. 2015-28551 (Google Translated)

  • Published 2015.2.12
  • Filing date 2013.7.30

Example

Example Focal distance Fno. Half angle Image height Overall length of the lens BF
One 294.00 4.14 4.21 21.64 239.07 83.42
Two 24.48 2.86 41.47 21.64 92.00 38.00
Three 51.70 1.30 22.71 21.64 94.01 37.50
Four 294.00 4.14 4.21 21.64 240.00 82.95
Five 6.15 20.45 71.28 2.88 3.71 3.69 30.34 9.98 2.89 3.60 84.11 86.12 90.41 11.74 15.68 8.50
Six 293.97 4.14 4.21 21.64 239.98 85.34

Source: EG

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