The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 27mm F1.2 Pro XF and the Sigma 16mm F1.4 DC DN X for their suitability to various photography scenarios:
Size and Weight Comparison
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 16mm F1.4 DC DN X weighs 405g, 27% (155g) lighter than the Viltrox 27mm F1.2 Pro XF's weight of 560g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Fujifilm X Mount for size comparison purposes.
Wideangle Lenses in Fujifilm X Mount for Size Comparison
Filter Threads
Both the Viltrox 27mm F1.2 Pro XF and the Sigma 16mm F1.4 DC DN X 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 Viltrox 27mm F1.2 Pro XF and the Sigma 16mm F1.4 DC DN X 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.
Focal Range
Viltrox 27mm F1.2 Pro XF is a prime lens with fixed focal lenght of 27mm which has an effective (full-frame 35mm equivalent) focal range of
40.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 16mm F1.4 DC DN X is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of 24mm when used on a APS-C / DX format camera.