The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox AF 16mm f1.8 FE and the Sigma 20mm F1.4 DG DN A 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 20mm F1.4 DG DN A is the longer of the two lenses at 111mm. The Viltrox AF 16mm f1.8 FE with a length of 103mm, is 8mm shorter. Besides being longer, the Sigma 20mm F1.4 DG DN A also has a larger diameter of 88mm compared to the Viltrox AF 16mm f1.8 FE's 85mm 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 AF 16mm f1.8 FE weighs 550g, which means it is 85g (13%) lighter than the Sigma 20mm F1.4 DG DN A which has a weight of 635g.
Filter Threads
The Viltrox AF 16mm f1.8 FE has a filter size of 77mm whereas the Sigma 20mm F1.4 DG DN A has a 82mm 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 AF 16mm f1.8 FE:
And these are the 82mm filters that we recommend for the Sigma 20mm F1.4 DG DN A:
Lens Mounts
Both the Viltrox AF 16mm f1.8 FE and the Sigma 20mm F1.4 DG DN A has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Sigma 20mm F1.4 DG DN A is also available in Leica L mount.
Focal Range
Viltrox AF 16mm f1.8 FE is a prime lens with fixed focal lenght of 16mm.
On the other hand, the Sigma 20mm F1.4 DG DN A is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36mm.
