The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sirui Sniper 23mm f1.2 X and the Viltrox 27mm F1.2 Pro XF 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. Sirui Sniper 23mm f1.2 X weighs 380g, which means it is 180g (32%) lighter than the Viltrox 27mm F1.2 Pro XF which has a weight of 560g.
Filter Threads
The Sirui Sniper 23mm f1.2 X has a filter size of 58mm whereas the Viltrox 27mm F1.2 Pro XF has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Sirui Sniper 23mm f1.2 X:
And these are the 67mm filters that we recommend for the Viltrox 27mm F1.2 Pro XF:
Lens Mounts
Both the Sirui Sniper 23mm f1.2 X and the Viltrox 27mm F1.2 Pro XF 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
Sirui Sniper 23mm f1.2 X is a prime lens with fixed focal lenght of 23mm which has an effective (full-frame 35mm equivalent) focal range of
34.5mm when used on a APS-C / DX format camera.
On the other hand, the 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.