A reader informed me that there are actually two different versions of the Leica Super-Elmar-M 21mm f/3.4 ASPH lens (product number 11145). Here are the details: First, this is the Leica Super-Elmar-M 21mm f/3.4 ASPH lens version 1 (pictures from B&H): I was told that this first version would bind up when focussing and was … Continue reading Two different versions of the Leica Super-Elmar-M 21mm f/3.4 ASPH lens