Thanks wickerprints... that's the sort of things I meant buy a new version... details like that.


I have a 2X extender, and when used on a 400 f/2.8 - I find the quality to be outstanding, at ALL apertures I shoot at (usually between f/5.6, the minimum, and about f/8 or f/9). Now putting it on the 70-200 f/2.8 L IS USM - I do see a little of what you mean... not the clearest glass out there. I'm interested in getting the 1.4x but just not sure if I'll kick myself when a new version comes out haha!! I'll keep debating it. Luckily, it's only $300... it's not like I'm spending $1500 on a lens for a new version to come out right?