The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 10-18mm F2.8 DC DN C and the Samyang 12mm f2.0 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. Sigma 10-18mm F2.8 DC DN C is the longer of the two lenses at 64mm. The Samyang 12mm f2.0 with a length of 59mm, is 5mm shorter. On the other hand, the Samyang 12mm f2.0 has a larger diameter of 73mm compared to the Sigma 10-18mm F2.8 DC DN C's 72mm 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. Sigma 10-18mm F2.8 DC DN C weighs 250g, which means it is 10g (3%) lighter than the Samyang 12mm f2.0 which has a weight of 260g.
Filter Threads
Both the Sigma 10-18mm F2.8 DC DN C and the Samyang 12mm f2.0 have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 10-18mm F2.8 DC DN C and the Samyang 12mm f2.0 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
Sigma 10-18mm F2.8 DC DN C is also available in the Sony E , Leica L and Canon RF mounts.
Samyang 12mm f2.0 is also available in Canon EF-M , Micro Four Thirds, Sony E and Samsung NX mounts.
Focal Range
Sigma 10-18mm F2.8 DC DN C has a focal range of 10-18mm and
1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-27mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 12mm f2.0 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.
