So I'm looking into getting another 70-200. id love a canon 70-200mm f 2.8l is ii but its a bit out of my budget. Right now I'm trying to decide between three. Thoughts? I used to own a 70-200 f4 L but would like something a little better in low light situations.
-Canon EF 70-200mm f/2.8L USM
-Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens
-Sigma 70-200mm f2.8 ex dg os hsm



