Patent: Optical formulas for Canon RF macro lenses

Craig
1 Min Read

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We're obviously going to get an RF L macro lens sooner than later, and Canon News has uncovered another patent showing various optical formulas for such a lens.

Canon RF 65mm f/2.8

  • Focal length: 65.13mm
  • F number : 2.92
  • Angle of view: 18.38°
  • Image height: 21.64mm
  • Lens length: 135.78mm
  • Backfocus: 21.40mm

Canon RF 90mm f/2.8 Macro

  • Focal length: 87.04mm
  • F number: 2.92
  • Angle of view: 13.96°
  • Image height: 21.64mm
  • Lens length: 135.86mm
  • Backfocus: 19.58mm

Canon RF 100mm f/2.8 Macro

  • Focal length: 97.62mm
  • F number: 2.92
  • Angle of view: 12.50°
  • Image height: 21.64mm
  • lens length: 123.21mm
  • Backfocus: 18.86mm

Canon RF 180mm f/2.8 Macro

  • Focal length: 189.96mm
  • F number: 2.92
  • Angle of view: 6.50°
  • Image height: 21.64mm
  • Lens length: 185.34mm
  • Backfocus: 23.95mm
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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.
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