Another EF 100-400 Patent

Canon EF 100-400 f/4-5.6L IS Patent
We’ve previously shown a 100-400 in a patent, and it appears a second patent for nearly the same optical formula has come about.

EF 100-400 f/4-5.6L IS Optical Formula Patent

 

Example 1

  • Focal length f = 102.20 – 390.01mm
  • Fno. 4.10 – 5.90
  • Half angle of 11.95 – 3.18 °
  • Image height 21.64mm
  • Lens Length 228.18 – 288.12mm
  • Back Focus 51.23 – 69.84mm
  • 3.82x zoom ratio
  • Lens Construction 14 group of 19 images

Source: NL, PR via EG

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