Finally on its way?
I was told today that a new EF 100-400 f/4-5.6L IS will be making its debut “soonish”. It will be after the EF 200-400 f/4L IS 1.4x is officially announced.

It could be tested at Euro 2012 before being announced.


  • Ring zoom (not push/pull)
  • Latest IS System
  • 82mm Filter Size
  • Weather Sealed
  • Slightly heavier than the current model
  • Slightly faster f/4 at 100mm (Current is f/4.5)
  • Retail around $2800 USD

CR's Take
A few folks want an EF 400 f/5.6L IS, I'd think this sort of product would fill the void. I'd expect it to be optically awesome.

This comes from a pretty solid source, though lenses are always hard to nail down.


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