Originally Posted by AaronM

I'll have to STRONGLY disagree with you on this. I use my 70-200 f2.8 lens on at least 85% of my work. Heavy you say? Perhaps, but it's all in what you get used to carrying/using.

http://www.bhphotovideo.com/c/produc...Autofocus.html

This particular thread focuses on the use for sports which makes the 70-200 f2.8 one of the best possible options for the OP. Taking it a step further, it gives them the chance to add Canon's EF Extender II which will take them up to a 400mm f5.6 (I know, not a full frame camera so not a true 400mm but you get the idea)

http://www.bhphotovideo.com/c/produc...tender_II.html

Similar lens, good brand, way less money.
http://www.bhphotovideo.com/c/produc...2_8_II_EX.html

The EF Extender WILL NOT work on the 24-70 that you have but when it comes to sports, it's an inexpensive way to maximize the 70-200 lens.



If they were doing "serious photography" then they would probably already know this. However, they are not. This person is using a Canon 40D and as with most 40D users, they probably rarely venture off of "Auto" mode. A constant stop lens is not needed for most practical applications.....Not that it hurts but why even mention it in this thread at all?