Leica users have had access to the excellent Voigtlander 35mm f/1.2 Nokton across multiple versions for many years. Leica M 35mm f/1.2 Noctilux: How It FeelsThe 35mm Noctilux could have been physically humongous, but the intention was to keep this lens fairly compact and manageable. Leica M 35mm f/1.2 Noctilux: How It ShootsThe controls on a Leica lens may be very simple, but the optical engineering involved can be quite sophisticated. Leica M 35mm f/1.2 Noctilux: Exquisite and ExpensiveThe Leica 35mm f/1.2 Noctilux is going to be the best ultra-fast 35mm lens you can get for the M series right now. The clear choice is the latest Voigtlander 35mm f/1.2 Nokton IV, which has been through multiple updates and is widely loved.