The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox AF 50mm F2.0 Air and the Sigma 45mm F2.8 DG DN 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 AF 50mm F2.0 Air is the longer of the two lenses at 57mm. The Sigma 45mm F2.8 DG DN C with a length of 46mm, is 11mm shorter. Besides being longer, the Viltrox AF 50mm F2.0 Air also has a larger diameter of 65mm compared to the Sigma 45mm F2.8 DG DN C'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.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Viltrox AF 50mm F2.0 Air has a filter size of 58mm whereas the Sigma 45mm F2.8 DG DN 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 AF 50mm F2.0 Air:
And these are the 55mm filters that we recommend for the Sigma 45mm F2.8 DG DN C:
Lens Mounts
Both the Viltrox AF 50mm F2.0 Air and the Sigma 45mm F2.8 DG DN C 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.
Viltrox AF 50mm F2.0 Air is also available in the Nikon Z mount.
Sigma 45mm F2.8 DG DN C is also available in Leica L mount.
Focal Range
Viltrox AF 50mm F2.0 Air is a prime lens with fixed focal lenght of 50mm. 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 45mm F2.8 DG DN C is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 67.5mm.
