The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Summilux-M 24mm f1.4 ASPH and the Leica Summilux-M 21mm f1.4 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 Summilux-M 21mm f1.4 Asph is the longer of the two lenses at 66mm. The Leica Summilux-M 24mm f1.4 ASPH with a length of 59mm, is 7mm shorter. Besides being longer, the Leica Summilux-M 21mm f1.4 Asph also has a larger diameter of 70mm compared to the Leica Summilux-M 24mm f1.4 ASPH's 61mm 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. Leica Summilux-M 24mm f1.4 ASPH weighs 500g, which means it is 80g (13%) lighter than the Leica Summilux-M 21mm f1.4 Asph which has a weight of 580g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Wideangle Lenses in Leica M Mount for Size Comparison
Lens Mounts
Both the Leica Summilux-M 24mm f1.4 ASPH and the Leica Summilux-M 21mm 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 Monochrome, Leica M11 and Leica M10.
Focal Range
Leica Summilux-M 24mm f1.4 ASPH is a prime lens with fixed focal lenght of 24mm.
On the other hand, the Leica Summilux-M 21mm f1.4 Asph is a prime lens with fixed focal lenght of 21mm.