Yes, as far as I am aware. Only the later lens will have more advanced coating and show less wear on the barrel and the focussing helicoid.
I am not a fan of collapsible lenses so would prefer the one on the left. I had a M3 with a collapsible Summicron few years ago and had the opportunity to try a rigid version for a few days. The feel of the rigid one was better and did give a minor improvement in performance
Last edited by BMbikerider; 09-14-2012 at 11:31 AM. Click to view previous post history.