Just a quick roadtest of the Sigma APO 70-200mm F2.8 II EX DG MACRO HSM.
This shot was taken at F5.6 1/320th @ ISO 200. Look at that DOF. This was taken at the minimum distance this lens focuses at which is constant through its full range at 100cm/39.4in and maximum magnification of 1:3.5.
I've done a quick curves adjustment, but nothing else. No sharpening.
Personally I've never used a macro lens before because it hasn't been a priority for me, and although this isn't a 'true' macro it looks like it's going to be fun. I can understand why light is so important for macro work now. If I want any kind of DOF I'm going to have to light my subject up to get a decent aperture.
I plan to use this lens mainly for sport and also for some theatre work so I'll be sure to post further results once I've had a chance to try it out.