Croasdail wrote:
looks like most of the adds for the 2.8s are from dealers - most of the f4 are private sellers. My guess is a lot of people find that shooting ourdoors (you wouldn't buy the f4 for indoor events.. would ya?) that 200 is too short for most sports. It works great for tennis, volleyball and to a lesser extent baseball, but soccer, football, lacrosse..... you get the idea, it's reach is too short. So either they are upgrading to 2.8 so that can shoot in low light... or they are going for a more reaching lens. I doubt it is a quality issue.
For soccer and football, it depends how close on the field you can get. If you can be a foot off the sidelines, the 70-200 f/2.8 is very useable. But regardless, its one of the top 5 lens you can have in your setup. Very versatile.