Patent: Optical Formula for an EF 800mm f/5.6L IS II

Craig Blair
1 Min Read

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An updated EF 800mm f/5.6L IS is a lens I figured we would have seen already, but here we are still waiting for an update. For the moment, owning an EF 600mm f/4L IS II and a 1.4 teleconverter outperforms the EF 800mm f/5.6L IS in most of the important ways.

It looks like Canon is continuing to work on a follow-up to the longest lens in the current EF lineup.

Japan Patent Application 2018-087965

  • Focal distance 780.00
  • F number 5.80
  • A half field angle (degree) — 1.59
  • Image height 21.64 whole length of the lens 485.85
  • BF 128.77

We've been told to expect new “big white lenses” some time in the next year, but we do not yet know which lenses in the lineup will see an update.

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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.
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