The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Carl Zeiss Touit 2.8/12 and the Samyang 10mm f2.8 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 Touit 2.8/12 is the longer of the two lenses at 86mm. The Samyang 10mm f2.8 with a length of 77mm, is 9mm shorter. On the other hand, the Samyang 10mm f2.8 has a larger diameter of 86mm compared to the Carl Zeiss Touit 2.8/12's 82mm 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 Touit 2.8/12 weighs 270g, which means it is 310g (53%) lighter than the Samyang 10mm f2.8 which has a weight of 580g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Fujifilm X Mount for size comparison purposes.
Ultra-Wideangle Lenses in Fujifilm X Mount for Size Comparison
Lens Mounts
Both the Carl Zeiss Touit 2.8/12 and the Samyang 10mm f2.8 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-S20, Fujifilm X-T5 and Fujifilm X-H2.
Carl Zeiss Touit 2.8/12 is also available in Sony E mount.
Samyang 10mm f2.8 is also available in Canon EF , Canon EF-M, Nikon F (DX), Four Thirds and Micro Four Thirds mounts.
Focal Range
Carl Zeiss Touit 2.8/12 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of
18mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 10mm f2.8 is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of 15mm when used on a APS-C / DX format camera.