The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Thypoch 21mm f3.5 and the Leica Elmar-M 24mm 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 Elmar-M 24mm f3.8 ASPH is the longer of the two lenses at 53mm. The Thypoch 21mm f3.5 with a length of 35mm, is 18mm shorter. On the other hand, the Thypoch 21mm f3.5 has a larger diameter of 58mm compared to the Leica Elmar-M 24mm f3.8 ASPH's 41mm 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. Thypoch 21mm f3.5 weighs 131g, which means it is 129g (49%) lighter than the Leica Elmar-M 24mm f3.8 ASPH which has a weight of 260g.
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
Filter Threads
The Thypoch 21mm f3.5 has a filter size of 39mm whereas the Leica Elmar-M 24mm f3.8 ASPH has a 46mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 39mm filters that we recommend you to consider for the Thypoch 21mm f3.5:
And these are the 46mm filters that we recommend for the Leica Elmar-M 24mm f3.8 ASPH:
Lens Mounts
Both the Thypoch 21mm f3.5 and the Leica Elmar-M 24mm 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 M EV1, Leica M11-D and Pixii Max.
Focal Range
Thypoch 21mm f3.5 is a prime lens with fixed focal lenght of 21mm.
On the other hand, the Leica Elmar-M 24mm f3.8 ASPH is a prime lens with fixed focal lenght of 24mm.