New Patent : Canon RF 100-400mm f/5.0-7.1 & RF 100-300mm f/5.6-8.2 Lens

Here are two new Canon patents . The optical formulas are for RF 100-400mm f/5.0-7.1, RF 100-300mm f/5.6-8.2 and RF-S 55-250mm f/4.5-7.1 lenses. Note that the last one has an “RF-S”.

We can say that the RF 100-400mm f/5.0-7.1 and RF 100-300mm f/5.6-8.2 Canon lenses seem to be inexpensive telephoto lenses for RF-mount full frame mirrorless cameras.  According to the designation, the RF-S 55-250mm f/4.5-7.1 is clearly designed for an APS-C sensor.

Embodiment 1:

  • Wide-angle intermediate telephoto
  • Focal length 103.00 200.00 388.50
  • F number 5.00 6.26 7.10
  • Half angle of view (degrees) 11.86 6.17 3.19
  • Image height 21.64 21.64 21.64
  • Lens overall length 215.58 255.38 293.58
  • BF 38.40 58.61 78.01

Embodiment 2:

  • Wide-angle intermediate telephoto
  • Focal length 103.01 200.00 388.50
  • F number 5.00 6.45 7.10
  • Half angle of view (degrees) 11.86 6.17 3.19
  • Image height 21.64 21.64 21.64
  • Lens overall length 207.99 243.96 285.99
  • BF 45.82 78.95 112.66

Embodiment 3:

  • Wide-angle intermediate telephoto
  • Focal length 103.00 200.00 388.48
  • F number 5.18 6.70 8.24
  • Half angle of view (degrees) 11.86 6.17 3.19
  • Image height 21.64 21.64 21.64
  • Lens overall length 203.50 243.44 273.50
  • BF 41.10 76.59 114.00

Embodiment 4 (for APS-C sensor):

  • Wide-angle intermediate telephoto
  • Focal length 56.66 120.00 242.50
  • F number 4.66 6.45 7.10
  • Half angle of view (degrees) 13.55 6.49 3.22
  • Image height 13.66 13.66 13.66
  • Lens overall length 129.73 155.54 184.73
  • BF 19.19 43.59 64.21

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