According to dxomark I stopped believing on what they say about lensesCanon had better optimize the performance at 400mm. Sony's 70-400mm is excellent in this aspect according to DxOMark.
I wonder if it will be this year that this rumour is right... I love the way it says that the info comes from a new source - own up who started the rumour this time? It would be interesting if it does happen (not that I can see me bothering to change).
It has to be right one year. Maybe this is the one.
This article seems to confirm a new 100-400 is somewhere in the pipeline.
What no push pull zoom! That was the best feature of my 100-400!
I wonder how long the pipe is?
With offerings from Tamron and Sigma that reach 600mm, 100-400mm seems rather insufficient now