When Leica lent me their new Super-Elmar-M 21mm f/3.4 ASPH lens, I gave a figurative shrug. I already owned an excellent copy of an old 21mm f/2.8 Elmarit pre-ASPH, which I absolutely love. So it would be highly unlikely that Leica's new 21mm would actually inspire a case of gear lust… but gear lust I have. The Leica 21mm Super-Elmar-M is one of the most stunning lenses I've yet mounted on any camera. This article discusses the reasons why I feel this way.