Canon Patents: RF 400mm f/2.8L, RF 500mm f/4L, RF 600mm f/4L

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The previous report said the first RF mount super telephoto prime lens will probably be the RF 500mm f/4L IS USM Lens. Now, Canon has filed three new patents for RF 400mm f/2.8L, RF 500mm f/4L, RF 600mm f/4L IS USM Lenses for Canon EOS R system. Take a look at the patents details below:

Canon RF 400mm f/2.8L IS USM

  • Focal length: 392mm
  • F number: 2.9
  • Angle of view: 3.16°
  • Image height: 21.64mm
  • Entire lens length: 360mm
  • Backfocus: 31mm

Canon RF 500mm f/4L IS USM

  • Focal length: 490mm
  • F number: 4.12
  • Angle of view: 2.53°
  • Image height: 21.64mm
  • Entire lens length: 412mm
  • Backfocus: 33mm

Canon RF 600mm f/4L IS USM

  • Focal length: 588mm
  • F number: 4.12
  • Angle of view: 2.11°
  • Image height: 21.64mm
  • Entire lens length: 476mm
  • Backfocus: 33mm

Via: Canonrumors