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 Leica Noctilux-M 75mm F1.25 ASPH 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. Leica Noctilux-M 75mm F1.25 ASPH is the longer of the two lenses at 91mm. The Voigtlander 50mm f3.5 I with a length of 45mm, is 46mm shorter. Besides being longer, the Leica Noctilux-M 75mm F1.25 ASPH also has a larger diameter of 74mm 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 905g (85%) lighter than the Leica Noctilux-M 75mm F1.25 ASPH which has a weight of 1055g.
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
Filter Threads
The Voigtlander 50mm f3.5 I has a filter size of 34mm whereas the Leica Noctilux-M 75mm F1.25 ASPH has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 34mm filters that we recommend you to consider for the Voigtlander 50mm f3.5 I:
And these are the 67mm filters that we recommend for the Leica Noctilux-M 75mm F1.25 ASPH:
Lens Mounts
Both the Voigtlander 50mm f3.5 I and the Leica Noctilux-M 75mm F1.25 ASPH 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 Leica Noctilux-M 75mm F1.25 ASPH is a prime lens with fixed focal lenght of 75mm.
