I have used a non-stabilised sigma 70-200 f2.8 EX DG for several years now with my canon bodies and have found it to be an excellent all-round workhorse. Quick accurate focussing, good contrast, accurate colours, very solid build.
I shot some comparison images with this lens and a friend's canon 70-200 f2.8L, and couldnt see a significant difference when printing at 18" by 12". If the OS version has similar optics then you should be getting a very good lens for your money.
|