Cosina has announced a Voigtländer branded Nokton 50mm F1.1 high speed lens for the Leica M mount, in a launch which marks the 10th anniversary of Cosina's Bessa series of rangefinder cameras. The Nokton becomes the second-fastest lens currently available for the M mount after the Leica Noctilux 50mm f/0.95, yet despite its speed weighs in at a relatively manageable 15 ounces and uses 58mm filters. The lens is constructed with 7 elements in 6 group and has minimum focusing distance of 1m. It will start shipping from the end of this month at a retail price of approximately 130,000 yen.