This is probably a stupid question...
I just bought a 5d (pisses pants with excitement) and I've gotten used to my crop body and 70-300. The high end lens is 70-200 2.8... how do guys with F use it? Do they add an extender and take the loss of light hit? Do they use a longer lens and shoot at 5.6? or f4? I was under the impression sports at 2.8 = gold...
help

