I am buying this lens used (from another forum) and just had a couple questions regarding it.
I thought there were two versions of this lens, the APO and non-APO. Is the APO DG a third version? If so which version is it I want? (I have a Rebel XTi)
The seller sent me pictures of the lens and box, the box is brown cardboard with red lettering that says Sigma 70-300mm F4-5.6 II APO Macro Super, but in the For Sale forum here I found another of these lenses that is in a black box and has DG listed with it.
If someone would take the time to set me straight on this it would really help out my first lens purchase. 
Thanks,
Kurt



