The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 12mm f1.4 and the Viltrox 15mm F1.7 X 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 12mm f1.4 is the longer of the two lenses at 69mm. The Viltrox 15mm F1.7 X with a length of 56mm, is 13mm shorter. Besides being longer, the Sigma 12mm f1.4 also has a larger diameter of 68mm compared to the Viltrox 15mm F1.7 X's 65mm diameter.
Below you can find a scaled side-by-side image of Sigma 12mm f1.4 and Viltrox 15mm F1.7 X to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 12mm f1.4 and the Viltrox 15mm F1.7 X Size and Weight 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. Viltrox 15mm F1.7 X weighs 180g, 19% (45g) lighter than the Sigma 12mm f1.4's weight of 225g.
Filter Threads
The Sigma 12mm f1.4 has a filter size of 62mm whereas the Viltrox 15mm F1.7 X has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 12mm f1.4:
And these are the 58mm filters that we recommend for the Viltrox 15mm F1.7 X:
Lens Mounts
The Sigma 12mm f1.4 has the Sony E lens mount whereas the Viltrox 15mm F1.7 X has the Fujifilm X lens mount . Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II , Sony A6700 and Sony FX30 for the Sony E Mount and Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Fujifilm X and Canon RF mounts.
Focal Range
Sigma 12mm f1.4 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 Viltrox 15mm F1.7 X 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.
