After the mount swap, check the focusing accuracy. My accuracy check was done before my M8 was working to expectations ( 2 trips to Leica to fix a camera I bought new) Keep the old mount ... and someday, when you sell the lens, you can return it to original condition.... Frank Filippone Red735i@xxxxxxxxxxxxx ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/