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Patent: Focal reducers for RF cinema functions | Canon Rumors


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Canon Information has uncovered a Canon patent exhibiting off some focal reducers of their newest spherical of patents.

This patent is for RF mount Cinema cameras that would cut back the focal size of full-frame lenses on Super35 picture sensors. These are usually not for EOS R cameras and definitely not for EOS M cameras.

The lens used for the embodiments is a 50mm f/1.4 full-frame EF mount lens.  The full lens size within the embodiments will present the 50mm lens in addition to the focal airplane distance which is 20mm, plus the reducer.

Canon Mirrorless Diminished 40mm F1.1

  • Focal size 40.14mm
  • F-number 1.13
  • Half-angle 20.24°
  • Picture peak 14.80mm
  • Lens General size 93.90mm
  • BF 11.81mm

Canon Mirrorless Diminished 35mm F1.0

  • Focal size 36.54mm
  • F-number 1.03
  • Half-angle 22.05°
  • Picture peak 14.80mm
  • complete lens size 91.95mm
  • BF 10.70mm

Canon Mirrorless Diminished 32mm F.95

  • Focal size 33.45mm
  • F-number 0.94
  • Half angle of view 22.42°
  • Picture peak 13.80mm
  • Lens complete size 91.91mm
  • BF 9.73mm



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