The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 40mm F1.4 Nokton Classic and the Leica Noctilux-M 50mm f0.95 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Leica Noctilux-M 50mm f0.95 ASPH is the longer of the two lenses at 75mm. The Voigtlander 40mm F1.4 Nokton Classic with a length of 30mm, is 45mm shorter. Besides being longer, the Leica Noctilux-M 50mm f0.95 ASPH also has a larger diameter of 73mm compared to the Voigtlander 40mm F1.4 Nokton Classic's 55mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Voigtlander 40mm F1.4 Nokton Classic weighs 175g, which means it is 525g (75%) lighter than the Leica Noctilux-M 50mm f0.95 ASPH which has a weight of 700g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Leica M Mount for size comparison purposes.
Standard Prime Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both the Voigtlander 40mm F1.4 Nokton Classic and the Leica Noctilux-M 50mm f0.95 ASPH has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Leica M11, Leica M10 and Leica M Typ 262.
Focal Range
Voigtlander 40mm F1.4 Nokton Classic is a prime lens with fixed focal lenght of 40mm. Leica Noctilux-M 50mm f0.95 ASPH is a prime lens with fixed focal lenght of 50mm.