Quote (jayandnix @ Apr 24 2011 09:58pm)
i have the f/2.8 IS and love it, but truthfully it is more than most ppl would ever need
it does depend on if you are shooting indoors or outdoors, outdoor f/4 will be great
indoor the f/2.8 only gains you 1 extra stop in ISO, which can help but may not be such a great advantage
if you are not planning on making money off it (or maybe a little $$$ here and there) then get the f/4
if you are making money then go straight for the f/2.8 IS
remember you could always upgrade at a later stage if you do make money, but you could never go from the f/2.8 IS down to the f/4
I'd rather get the 70-200 F4 L IS than the 70-200 F2.8 L IS version 1. Not only is it less expensive, it's sharper, lighter, and I currently have 1 for sale (i've had it for sale for a while, but it's hard to let go of such a gfg backup lens).