The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Super-Elmar-M 21mm f3.4 ASPH and the Carl Zeiss C Biogon T4,5/21 ZM 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. Carl Zeiss C Biogon T4,5/21 ZM is the longer of the two lenses at 56mm. The Leica Super-Elmar-M 21mm f3.4 ASPH with a length of 43mm, is 13mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 53mm.
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. Carl Zeiss C Biogon T4,5/21 ZM weighs 210g, 24% (69g) lighter than the Leica Super-Elmar-M 21mm f3.4 ASPH's weight of 279g.
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
Both the Leica Super-Elmar-M 21mm f3.4 ASPH and the Carl Zeiss C Biogon T4,5/21 ZM have the same Filter thread size of 46mm.
Below are links to the 46mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Leica Super-Elmar-M 21mm f3.4 ASPH and the Carl Zeiss C Biogon T4,5/21 ZM 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
Both lenses have the same focal range of
21mm but while Leica Super-Elmar-M 21mm f3.4 ASPH has the fastest aperture of
F3.4, the Carl Zeiss C Biogon T4,5/21 ZM's widest aperture value is
F4.5.