The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 12mm F5.6 and the Leica Tri-Elmar-M 16-18-21mm f4 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
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 12mm F5.6 weighs 230g, which means it is 105g (31%) lighter than the Leica Tri-Elmar-M 16-18-21mm f4 ASPH which has a weight of 335g.
Lens Mounts
Both the Voigtlander 12mm F5.6 and the Leica Tri-Elmar-M 16-18-21mm f4 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 12mm F5.6 is a prime lens with fixed focal lenght of 12mm.
On the other hand, the Leica Tri-Elmar-M 16-18-21mm f4 ASPH has a focal range of 16-21mm and 1.3X zoom ratio .