Canon patents optical formulation for an RF 200-500mm f/4L IS 1.4x


One of many extra fashionable “huge white lenses” from Canon was the EF 200-400mm f/4L IS 1.4x. It was by no means a attain to imagine Canon would make an RF follow-up to that lens. It additionally should not shock anybody that Canon would do a redesign of the lens as a substitute of a merely modifying the present design for the RF mount.

On this patent discovered by asobinet, Canon exhibits a bevy of comparable optical formulation. If we needed to guess, the RF 200-500mm f/4L IS 1.4x can be the proper follow-up to its EF mate.

Canon RF 200-400mm f/4L IS 1.4x

  • Focal size: 205.1mm – 385.5mm
  • F-number: 4.1
  • Half angle of view: 5.99 – 3.21
  • Picture Top: 21.63mm
  • Size Total: 367.62mm
  • Again Focus: 39.994mm

Canon RF 200-500mm f/4L IS 1.4x

  • Focal size: 207.0mm – 487.9mm
  • F-number: 4.1
  • Half angle of view: 5.97-2.54
  • Picture Top: 21.63mm
  • Size Total: 410.05mm
  • Again Focus: 39.998mm

Canon RF 300-700mm f/5.6L IS 1.4x

  • Focal size: 288.1mm – 678.9mm
  • F-number: 5.7
  • Half angle of view: 4.30-1.83
  • Picture Top: 21.65mm
  • Size Total: 410.05mm
  • Again Focus: 39.998mm

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