Just out of curiosity...I have a 35mm Canon EOS Rebel 2000 with the 18-58mm stock lens that it came with. I also have a 70-210mm lens that I dug up also made by Canon. Will these lenses work with DSLR's such as the Canon XTi or XSi?? I can get the bodies for between $250-$350 instead of spending $500 or more. Any information is greatly appreciated and as always..cheers.