if you used one of the 300s instead of the 70-200 you would get an even tighter crop.

hi, i am wondering what sort of result i would get from a Canon prime 200mm f 2.8 L on a canon 20D with cropping factor of 1.6, ie equivalent to 320mm, versus the famed 300mm 2.8 and more realistically the 300f4.
thank you