The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 75mm f1.2 AF 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 75mm f1.2 AF is the longer of the two lenses at 101mm. The Sigma 56mm F1.4 C with a length of 60mm, is 41mm shorter. Besides being longer, the Viltrox 75mm f1.2 AF also has a larger diameter of 87mm 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, 58% (390g) lighter than the Viltrox 75mm f1.2 AF's weight of 670g.
Filter Threads
The Viltrox 75mm f1.2 AF has a filter size of 77mm 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 77mm filters that we recommend you to consider for the Viltrox 75mm f1.2 AF:
And these are the 55mm filters that we recommend for the Sigma 56mm F1.4 C:
Lens Mounts
The Viltrox 75mm f1.2 AF has the Sony E lens mount whereas the Sigma 56mm F1.4 C 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.
Viltrox 75mm f1.2 AF is also available in the Fujifilm X and Nikon Z mounts.
Sigma 56mm F1.4 C is also available in Nikon Z and Canon RF mounts.
Focal Range
Viltrox 75mm f1.2 AF is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a APS-C / DX format camera.
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.
