Rob, I remember because the M4 I inherited from my dad in 1973 had a 135mm Hector SM lens with an adapter to enable it to be mounted in an M-mount camera. You can still buy such an adapter today and use your SM lenses on M bodies, all the way to M9 I believe, though I'm not sure about the M9; it may be M-mount only. So, the M-Mount did not obsolete all the SM lenses. SM owners went on using them. Others will know more about it than me. Best, Bill On Sep 29, 2010, at 12:58 PM, Robert Lilley wrote: > I am sure there has to be someone in the group that sort of remembers those > days. ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/