I have a Quantaray AF Tech 10 lens I had used with my Canon Rebel G and was told that I could use it with my Canon Rebel XT. When I try to use it, it won't let me do anything with it. The camera says err 99 and locks up on me. I've spoke with Quantaray's support and they said it should work with the Canon XT and to talk with Canon. I've spoke with Canon and they said there is a communication error. Can anyone help me? Is there somewhere that can update the software in the lens or anything I could get to correct this problem?
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Sigma just told me the lens is too old and there is no update for the lens.
I have a Minolta Maxim 5 camera with Quantaray autofocus lenses . 70-300mm for example... are they compatable with a canon eos digital or something of that nature?
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