The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 25mm F1.7 Z and the Sigma 30mm F1.4 C 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 30mm F1.4 C is the longer of the two lenses at 73mm. The Viltrox 25mm F1.7 Z with a length of 56mm, is 17mm shorter. Besides being longer, the Sigma 30mm F1.4 C also has a larger diameter of 65mm compared to the Viltrox 25mm F1.7 Z'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. Viltrox 25mm F1.7 Z weighs 180g, which means it is 85g (32%) lighter than the Sigma 30mm F1.4 C which has a weight of 265g.
Filter Threads
Both the Viltrox 25mm F1.7 Z and the Sigma 30mm F1.4 C have the same Filter thread size of 52mm.
Below are links to the 52mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Viltrox 25mm F1.7 Z has the Nikon Z lens mount whereas the Sigma 30mm F1.4 C has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are RED Komodo-X 6K Z, Nikon Z50 II and Nikon Z30 for the Nikon Z Mount and Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
Sigma 30mm F1.4 C is also available in Micro Four Thirds , Fujifilm X, Nikon Z, Leica L and Canon RF mounts.
Focal Range
Viltrox 25mm F1.7 Z is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of
37.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 30mm F1.4 C is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 45mm when used on a APS-C / DX format camera.
