Hi all,
I currently have a Canon 70-200 F4L and as much as I really like this lens I am thinking of swapping it for the Sigma 2.8 version. Mainly because I do a lot of off road cycling pictures and find myself in the woods quite a bit and think the F2.8 might help just that little bit more.
Do you think it is worth it? It wouldn't cost me much to change over to the Sigma.
Phil



