The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 15mm f1.4 DC C and the Viltrox 27mm F1.2 Pro XF 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. Viltrox 27mm F1.2 Pro XF is the longer of the two lenses at 92mm. The Sigma 15mm f1.4 DC C with a length of 65mm, is 27mm shorter. Besides being longer, the Viltrox 27mm F1.2 Pro XF also has a larger diameter of 73mm compared to the Sigma 15mm f1.4 DC C's 64mm 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 15mm f1.4 DC C weighs 225g, which means it is 335g (59%) lighter than the Viltrox 27mm F1.2 Pro XF which has a 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
The Sigma 15mm f1.4 DC C 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 Sigma 15mm f1.4 DC C:
And these are the 67mm filters that we recommend for the Viltrox 27mm F1.2 Pro XF:
Lens Mounts
Both the Sigma 15mm f1.4 DC C 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.
Sigma 15mm f1.4 DC C is also available in the Canon RF and Sony E mounts.
Focal Range
Sigma 15mm f1.4 DC C is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of
22.5mm 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.
