Very much depends on what you want to use it for...
Can't advise on that, but if it makes any difference, Kerso will sell you a brand new 70-200 f/2.8 IS with full 1yr warranty for £960. I just bought one, and am very happy with it![]()
Unless you really have a need for a really fast version of the lens you'd be better off with the f4 version purely because of the weight issue. I'm thinking about one or the other as well as an upgrade in the near future and have decided i'd just get fed up with the weight of the 2.8. I probably don't really need the super fast one though I would appreciate the limited depth of field sometimes. I think the rational partof me and my wallet will dictate it must be the f4 IS for me.
Well, it looks to me like the f/4 is substantially sharper that the f/2.8...
check out this link for a visual comparison
http://www.the-digital-picture.com/...nsComp=404&CameraComp=9&SampleComp=0&Lens=242
Well, it looks to me like the f/4 is substantially sharper that the f/2.8...