I really want (yes, childish want not need
) to buy the 400 5.6. But with results like this from my 70-200 I'm having trouble justifying it to myself.
This was taken at 400mm, nearly 100% crop, 7D through trees on an overcast day at 1250 ISO, 1/200, 5.6. Zero sharpening done, tweaked color and contrast (it does tend to wash out a touch, but not too bad and can be corrected in PP)




