Hi Larry,
conurus posted today here in the forum, that thy start to offer now a Contax N-lens to Sigma SD14 body conversion.
Maybe you ask him here in the forum, whether he could make a Canon lens to Sigma SA mount change.
In fact you can do this also on your own. We have users in our German Sigma Forum (
), who did it already. As a matter of fact, one of the moderators here in the English Sigam User forum (Uwe), has done it alraedy. maybe he can give more details about it.
The Sigma mount and the Canon mount are very similar. Even the electronic cables for AF etc. are easy to connect.
The Distance body-lens is the exact same with Sigma and Canon. So you need only to be willing to screw on your Canon lenses and you need a spare Sigma mount from an old defect Sigma lens with Sigma mount.
You change in this case the mount on the lens, not on the body. So each Canon lens becomes a Sigma mount lens. The Sigma body stays untouched. AF etc. are afterwards working.
Best wishes