Howabout a 1000mm replacement for the EF 800mm f/5.6L IS? A patent showing the optical formula for an EF 1000mm f/5.6 IS DO has appeared.

We've seen the prototype for a future EF 600mm f/4 IS DO BR already, and the likelihood of seeing more DO lenses I think is pretty high. A 1000mm lens would be a great replacement for the current 800mm lens.

Patent Publication No. 2016-102852 (Google Translated)

  • Published 2016.6.2
  • Filing date 2014.11.27
  • Zoom ratio 1.00
  • Focal length 950.00
  • F-number 5.80
  • Angle of view 1.30
  • Image height 21.64
  • Overall length of the lens 485.94
  • BF 0.40
  • Canon patent
  • Positive and negative Shibomake
  • Diffractive optical element (first group)
  • Inner focus (the second group)
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