I have the opportunity to buy some lenses from a fellow on another forum but wanted to be assured of their compatibility with my camera. They are older Sigma lenses as follows: 90mm 2.8 21-35mm 3.5-4.2 I have a Canon Rebel 2000 that I bought in November of 2003 but was told by a Sigma rep via email that these lenses would be incompatible with this camera. I guess I am hoping beyond hope that they might work despite the words of the Sigma guy simply because they are a group of lenses (there is one other for sale that will work with my body) that I would like to have in my bag! Do you have any ideas about Canon/Sigma compatibility issues? Your help is much appreciated.