Canon Patents

Patent: Canon EF 600mm f/4 DO IS

A lens we’d all like to see happen has appeared in a patent, a 600mm f/4 DO IS. This isn’t the first time we’ve seen a patent for DO lens with a longer focal length than 400mm.

Patent Publication No. 2015-11171 (Google Translated)

  • Published 2015.1.19
  • Filing date 2013.6.28

Example 2

  • Focal length 588.30mm
  • Fno. 4.12
  • Angle of view 2.11 °
  • Image height 21.64mm
  • Lens length 397.80mm
  • BF 2.02mm
  • Positive ShiboTadashi
  • Inner focus
  • Vibration control

Canon recently updated the 400mm DO lens and solved a lot of the issues some photographers experienced with the first one. If a 600mm variant could cost less than a house, there’d be a pretty good market for it I think.

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