No worries -

I agree if the softy tamzooka IQs at 600 the 100-400 on the full frame - the crop value dosn't keep up.. On the crop sensor comparing the 100-400 to the full frame 150-600 it leans to the Canon BUT.... That really isn't the comparison.

What I think this really points out is Canon could sell a BOAT LOAD of 300-600 f5.6 to 6.3 or something similar.