i own a canon 70-200 f/2.8 IS L which i pretty much just use for indoor school events and ballet. I own a canon 400 f/5.6 which i use only for birds ( ITS A RAZOR SHARP LENS ).
my problem is soccer, i need the reach! and adding a tc to the canon 70-200 doesnt quite make it......
what if i buy the sigma 120-300 f/2.8 with the 1.4 TC. and sell both canon lenses....
will the sigma with TC at 400 = the canon 400 prime in terms of IQ?
i know its heavy but does the 120-300 rival the canon 70-200 F/2.8 IS?
help!!
troy

Of course, it depends on the light as you know and maybe it won't stop action as well as a faster lens, but it does very well at birds in flight so it should stop football players. I think you can get decent bokah with that lens at distance too. You need some context for football but I get what you are saying about stuff in the background. You are considering giving up two great lenses when an hour of experimentation will give you the answer you need to decide the best route. 120-300mm EX seems to be about the best zoom you can get and certainly it is a popular sports lens for good reason.
