The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 50mm f3.5 I 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 f3.5 I is the longer of the two lenses at 45mm. The Voigtlander 40mm F1.4 Nokton Classic with a length of 30mm, is 15mm shorter. On the other hand, the Voigtlander 40mm F1.4 Nokton Classic has a larger diameter of 55mm compared to the Voigtlander 50mm f3.5 I's 52mm 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 50mm f3.5 I weighs 150g, which means it is 25g (14%) lighter than the Voigtlander 40mm F1.4 Nokton Classic which has a weight of 175g.
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 f3.5 I 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 M EV1, Leica M11-D and Pixii Max.
Focal Range
Voigtlander 50mm f3.5 I 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.