The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 21mm F1.8 Ultron and the Leica Summilux-M 24mm f1.4 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.Voigtlander 21mm F1.8 Ultron is the longer of the two lenses at 92mm. The Leica Summilux-M 24mm f1.4 ASPH with a length of 59mm is 33mm shorter. Besides being longer, the Voigtlander 21mm F1.8 Ultron also has a larger diameter of 62mm compared to Leica Summilux-M 24mm f1.4 ASPH's 61mm 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 F1.8 Ultron weighs 412g, which means it is 88g (17%) lighter than the Leica Summilux-M 24mm f1.4 ASPH which has a weight of 500g.
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
Both Voigtlander 21mm F1.8 Ultron and Leica Summilux-M 24mm f1.4 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.
Voigtlander 21mm F1.8 Ultron is a prime lens with fixed focal lenght of 21mm. Leica Summilux-M 24mm f1.4 ASPH is a prime lens with fixed focal lenght of 24mm.