Patent : Canon RF 400mm f/4 DO, 600mm f/4 DO, 800mm f/5.6 DO Lenses

Canon has filed a new lens patent for RF 400mm f/4 DO lens, 600mm f/4 DO lens, and 800mm f/5.6 lens.

According to hi-lows-note these lenses could be RF mount and designed for the Canon full frame mirrorless camera system a.k.a EOS R series models.

Remember next EOS R series full frame mirrorless cameras rumored to feature IBIS. So this makes sense that RF 400mm f/4 DO, RF 600mm f/4 DO, RF 800mm f/5.6 DO lenses could be made for Canon RF mount. Below are the details of the patent.

Canon Patent for RF 400mm f/4 DO, 600mm f/4 DO, 800mm f/5.6 DO Lenses

Canon EOS R body: $2,299 at AmazonB&HAdorama.

Canon Mount Adapter EF-EOS R: $99 at AmazonB&HAdorama.

Patent : Canon RF 400mm f/4 DO, 600mm f/4 DO, 800mm f/5.6 DO Lenses

RF 600mm f/4 DO Lens

  • Focal distance 582.00
  • F number 4.12
  • Half field angle (degree) 2.13
  • Image height 21.64
  • Whole length of the lens 394.25
  • BF 62.79

RF 400mm f/4 DO Lens

  • Focal distance 405.00
  • F number 4.12
  • Half field angle (degree) 3.06
  • Image height 21.64
  • Whole length of the lens 330.16
  • BF 50.46

RF 800mm f/5.6 DO Lens

  • Focal distance 795.00
  • F number 5.60
  • Half field angle (degree) 1.56
  • Image height 21.64
  • Whole length of the lens 490.24
  • BF 105.13

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