bin1238 years ago+110What exactly is the difference between this mc-11 and the mc-11 Sigma-SA. I want to use the Sigma 18-35 F1.8 on my Sony a6500.Show in original language (German)PhotoFreak8 years ago+110Sigma SA on Sony E is for Sigma lenses with SIGMA BAJONETT. Yes, Sigma also has cameras with their own bayonet ;)Show in original language (German)Commentglobe167 years ago-404If you want to use the Sigma 18-35mm lens on your Sony a6500, you must use this MC11 adapter. Autofocus works perfectly.Show in original language (German)Comment