02-24-2016, 09:58 AM
The adaptor is for lenses with Canon mount to put in front of Sony bodies. The Sigma cameras use Sigma mount directly. Maybe I don't get it, but I don't see an adaptor in front of a Sigma SD. Do you mean as a second camera together with Sigma camera + Sigma lenses? Nobody else makes lenses for Sigma mount, so the bodies are already limited to their own lenses.