Using M6 Mark ii with EF M lens 18-55 mm, AF is no longer working, will only work on manual setting. Have cleaned contacts, still no luck. Even tried with new EF M lens 15-45 mm with no luck. AF works with 70-200 USM 2.8L lens with Fotodiox Pro EF-EOS (M) auto adapter. Any suggestions to get AF working again?
Cleaning the contacts never helps and if done incorrectly can do permanent damage to them. The only thing to use is a qtip and a little denatured alcohol. The act of mounting and removing the lens is enough to keep the contacts 'clean'. They are gold plated and very fragile. In you case I would call Canon. 1 (800) 652-2666