The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 15mm F4.5 and the Leica Super-Elmar-M 18mm f3.8 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 Super-Elmar-M 18mm f3.8 ASPH is the longer of the two lenses at 58mm. The Voigtlander 15mm F4.5 with a length of 38mm, is 20mm shorter. Besides being longer, the Leica Super-Elmar-M 18mm f3.8 ASPH also has a larger diameter of 61mm compared to the Voigtlander 15mm F4.5's 59mm 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 15mm F4.5 weighs 156g, which means it is 154g (49%) lighter than the Leica Super-Elmar-M 18mm f3.8 ASPH which has a weight of 310g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Ultra-Wideangle Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both the Voigtlander 15mm F4.5 and the Leica Super-Elmar-M 18mm f3.8 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 Monochrome, Leica M11 and Leica M10.
Focal Range
Voigtlander 15mm F4.5 is a prime lens with fixed focal lenght of 15mm.
On the other hand, the Leica Super-Elmar-M 18mm f3.8 ASPH is a prime lens with fixed focal lenght of 18mm.