The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Super-Elmar-M 18mm f3.8 ASPH and the Carl Zeiss Biogon T2,8/21 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 Biogon T2,8/21 ZM is the longer of the two lenses at 75mm. The Leica Super-Elmar-M 18mm f3.8 ASPH with a length of 58mm, is 17mm shorter. On the other hand, the Leica Super-Elmar-M 18mm f3.8 ASPH has a larger diameter of 61mm compared to the Carl Zeiss Biogon T2,8/21 ZM's 53mm 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. Carl Zeiss Biogon T2,8/21 ZM weighs 280g, 9% (30g) lighter than the Leica Super-Elmar-M 18mm f3.8 ASPH's weight of 310g.
Lens Mounts
Both the Leica Super-Elmar-M 18mm f3.8 ASPH and the Carl Zeiss Biogon T2,8/21 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
Leica Super-Elmar-M 18mm f3.8 ASPH is a prime lens with fixed focal lenght of 18mm.
On the other hand, the Carl Zeiss Biogon T2,8/21 ZM is a prime lens with fixed focal lenght of 21mm.