I sold my 400 2.8 while it was still under warranty to loose as little as possible while awaiting the new version of the lens to be released. I am busy doing portraits all summer so it would get little use anyways, but may still shoot a few mens softball games.
I am wondering how the 70-200mm f/2.8L IS II & 1.4x Extender III Combo works for sports.
I know the lens is fantastic, just have not tried it with the new version of the 1.4x and hoping it will still be quick to focus if I need the extra reach.
Would be used on a 1D IV body.