The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 55mm f1.8 EVO and the Sigma 56mm 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. Viltrox 55mm f1.8 EVO is the longer of the two lenses at 76mm. The Sigma 56mm F1.4 C with a length of 60mm, is 16mm shorter. Besides being longer, the Viltrox 55mm f1.8 EVO also has a larger diameter of 69mm compared to the Sigma 56mm F1.4 C's 67mm 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 56mm F1.4 C weighs 280g, 24% (90g) lighter than the Viltrox 55mm f1.8 EVO's weight of 370g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Nikon Z Mount for size comparison purposes.
Standard Lenses in Nikon Z Mount for Size Comparison
Filter Threads
The Viltrox 55mm f1.8 EVO has a filter size of 58mm whereas the Sigma 56mm F1.4 C has a 55mm 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 Viltrox 55mm f1.8 EVO:
And these are the 55mm filters that we recommend for the Sigma 56mm F1.4 C:
Lens Mounts
Both the Viltrox 55mm f1.8 EVO and the Sigma 56mm F1.4 C has the same Nikon Z lens mount. Some of the latest released cameras that are compatible with the Nikon Z lenses are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z.
Viltrox 55mm f1.8 EVO is also available in the Sony E mount.
Sigma 56mm F1.4 C is also available in Fujifilm X and Canon RF mounts.
Focal Range
Viltrox 55mm f1.8 EVO is a prime lens with fixed focal lenght of 55mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Sigma 56mm F1.4 C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of 84mm when used on a APS-C / DX format camera.
