There have been several reports online describing flare issues when using the $7,350 APO Summicron 50mm f/2.0 Asph lens, but so far I have not seen any official response from Leica.
Few days ago, during the 2013 Digital Show in Melbourne, Kristian Dowling got a brief explanation from Leica’s CEO Alfred Schopf – current owner experiencing the issue should send their lens to Germany for repair:
“Kristian: Can you tell me about the current situation regarding flare issues found by owners of the Apo-Summicron 50/2 lens?
Alfred: Well after some problem solving we found 4 minor issues, and manufacturing was stopped for 3 weeks and will recommence next week. For current owners experiencing any issues, they should send their lens to Germany for a complete refurbish.”