who has experience with either the 1.4 or 2.0 extender and 70-200 F2.8L?
I'm thinking I may get one for a sports exchange next week
Yep, have used that combo quite a bit of late.
On my 20D seems to work OK although the occasional shot seems as if it's been "soft focussed" like a studio shot. (only when used with the 2x)
Some believe that the 2x is one of those items you can get good and bad copies of. Someone (might have been Shrimper) was telling me recently his one ain't that good.
As for the 1.4x, I barely ever notice performance differences when I use that on anything. Slows the auto focus down a tad - but other than that doesn't seem to have too much impact (then again the slowing of the focus might in itself be enough of a problem for you not to use it)
Try it anyway, better than forking out for something huge like a 400.
Cliff

finished now.




