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.
Features
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