Canon Patents: 300mm F2.8 1.4x, 400mm F2.8 1.4x, 600mm F4 1.4x with Built-in Teleconverters

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Canon has filed a new lenses patents for 300mm F2.8 1.4x, 400mm F2.8 1.4x, 600mm F4 1.4x with built-in teleconverters.

[Publication number] P2022142979
[Publication date] October 3, 2022
[Patent application title] Optical system, lens device, imaging device

Example 1 ML

  • Focal length: 389.00
  • F-value: 2.91
  • Half angle of view: 3.18
  • Image height: 21.64
  • Total length: 406.00
  • Back focus: 53.83

Example 1 Mounting a teleconverter

  • Focal length: 544.00
  • F-value: 4.19
  • Half angle of view: 2.28
  • Image height: 21.64
  • Overall length: 406.01
  • Back focus: 53.83

Example 2 ML

  • Focal length: 582.00
  • F-value: 4.12
  • Half angle of view: 2.13
  • Image height: 21.64
  • Overall length: 486.10
  • Back focus: 81.91

Example 2 Mounting a teleconverter

  • Focal length: 814.80
  • F-value: 5.88
  • Half angle of view: 1.52
  • Image height: 21.64
  • Overall length: 486.10
  • Back focus: 81.91

Example 3 ML

  • Focal length: 300.00
  • F-value: 2.91
  • Half angle of view: 4.12
  • Image height: 21.64
  • Total length: 320.00
  • Back focus: 49.68

Example 3 Teleconverter installation

  • Focal length: 420.00
  • F-value: 4.12
  • Half angle of view: 2.95
  • Image height: 21.64
  • Total length: 320.00
  • Back focus: 49.68

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