The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 50mm F1.5 and the Voigtlander 40mm F1.4 Nokton Classic for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Voigtlander 50mm F1.5 is the longer of the two lenses at 46mm. The Voigtlander 40mm F1.4 Nokton Classic with a length of 30mm, is 16mm shorter. On the other hand, the Voigtlander 40mm F1.4 Nokton Classic has a larger diameter of 55mm compared to the Voigtlander 50mm F1.5's 54mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Voigtlander 40mm F1.4 Nokton Classic weighs 175g, 40% (118g) lighter than the Voigtlander 50mm F1.5's weight of 293g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Leica M Mount for size comparison purposes.
Standard Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both the Voigtlander 50mm F1.5 and the Voigtlander 40mm F1.4 Nokton Classic has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Leica M11 Monochrome, Leica M11 and Leica M10.
Focal Range
Voigtlander 50mm F1.5 is a prime lens with fixed focal lenght of 50mm.
On the other hand, the Voigtlander 40mm F1.4 Nokton Classic is a prime lens with fixed focal lenght of 40mm.