The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 21mm F4 Color Skopar II and the Leica Summicron-M 28mm f2 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Leica Summicron-M 28mm f2 ASPH is the longer of the two lenses at 41mm. The Voigtlander 21mm F4 Color Skopar II with a length of 25mm is 16mm shorter. On the other hand, the Voigtlander 21mm F4 Color Skopar II has a larger diameter of 55mm compared to Leica Summicron-M 28mm f2 ASPH's 53mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Voigtlander 21mm F4 Color Skopar II weighs 136g, which means it is 134g (49%) lighter than the Leica Summicron-M 28mm f2 ASPH which has a weight of 270g.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Wideangle Prime Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both Voigtlander 21mm F4 Color Skopar II and Leica Summicron-M 28mm f2 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, Leica M10 and Leica M Typ 262.
Focal Range
Voigtlander 21mm F4 Color Skopar II is a prime lens with fixed focal lenght of 21mm. Leica Summicron-M 28mm f2 ASPH is a prime lens with fixed focal lenght of 28mm.