The canon's will definetly be ok, third party ..... maybe not
Any canon EF glass will work on your digital, the sigma lens(s) might be a crapshoot. As has been widely reported, sometimes the protocols in the body changes slightly and third party lenses no longer work and have to be sent back to the manufacturer to be "rechipped." From what I've read this can only be done once for whatever reason (or maybe that's all the manufacturer feels like bothering with).
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