http://www.canonrumors.com/ Finally on its way? 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