No other manufacturer offers as many 50mm lenses as Leica does for its M range. In the current line-up are four; the f2.5 Summarit, f2 Summicron, f1.4 Summilux and the f0.95 Noctilux. Along with 35mm, 50mm is the classic rangefinder focal length, so it comes as no surprise to find this many 50mm lenses available. Apart from purely the light gathering properties of them, each adds a unique signature to the image it creates; non more so than Leica’s Noctilux. The Noctilux, meaning “Light of the night”, started in 1966 with an f1.2 version designed by Helmut Marx. A new design by Dr Walter Mandler in 1976 pushed the aperture to an astonishing f1.0 and along with redesigns of the lens body resulting in four versions, the f1.0 Noctilux continued until it was replaced in 2008 by the current f0.95 Aspherical Noctilux designed by Peter Karbe……

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Edmond Terakopian Leica Noctilux-M 50 mm f0.95 ASPH reviews