Patents: RF 100-400mm f/3.5-5.6L IS, RF 70-300mm f/4-5.6 IS, RF 50-250mm f/4-5.6 IS

Canon has just filed more RF lens patents in Japan. Seems Canon is very serious on their new full frame mirrorless system. As already leaked online, Canon will announce at least 5 new RF lenses next week.

Japan Patent Application 2019-020679

Canon RF 100-400mm f/3.5-5.6L IS USM

  • Focal distance 102.21 195.97 389.86 ​
  • F number 3.83 4.93 5.85
  • Half angle of view (degree) 11.95 6.30 3.18
  • Image height 21.64 21.64 21.64
  • Lens total length 204.85 250.29 291.30
  • BF 4.31 31.68 97.49

Canon RF 70-300mm f/4-5.6 IS

  • Focal distance 68.25 126.36 288.22
  • F number 4.16 4.68 5.83
  • a half field angle (degree) — 17.59 9.72 4.29
  • Image height 21.64 21.64 21.64
  • Whole length of the lens 168.24 189.04 207.81
  • BF 12.70 30.65 79.58 ​

Canon RF 50-250mm f/4-5.6 IS

  • Focal distance 51.80 126.89 241.22
  • F number 4.04 5.18 5.77
  • a half field angle (degree) — 22.67 9.68 5.13
  • Image height 21.64 21.64 21.64
  • Whole length of the lens 136.91 175.70 210.70
  • BF 11.36 30.93 42.48

via: j-platpat