anyone know how this compares to the canon 70-200mm f/4 IS? i've been doing research for weeks, and it seems theres really no concrete comparisons between specific versions of this lens, since there's about 4 versions of the sigma.. i can buy the 70-200mm f/4 IS locally for $800 even, will this be worth the xtra $200?
edit: why is the HSM version more expensive than the HSM II? Isnt the HSM II newer?
Last edited by supfresh; 06-23-2013 at 10:23 AM..