The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 85mm F2.0 and the Sigma 90mm 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 85mm F2.0 is the longer of the two lenses at 76mm. The Sigma 90mm F2.8 DG DN C with a length of 60mm, is 16mm shorter. Besides being longer, the Viltrox 85mm F2.0 also has a larger diameter of 69mm compared to the Sigma 90mm 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. Sigma 90mm F2.8 DG DN C weighs 295g, 13% (45g) lighter than the Viltrox 85mm F2.0's weight of 340g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Sony E Mount for size comparison purposes.
Telephoto Lenses in Sony E Mount for Size Comparison
Filter Threads
The Viltrox 85mm F2.0 has a filter size of 58mm whereas the Sigma 90mm 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 85mm F2.0:
And these are the 55mm filters that we recommend for the Sigma 90mm F2.8 DG DN C:
Lens Mounts
Both the Viltrox 85mm F2.0 and the Sigma 90mm 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 85mm F2.0 is also available in the Nikon Z mount.
Sigma 90mm F2.8 DG DN C is also available in Leica L mount.
Focal Range
Viltrox 85mm F2.0 is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
127.5mm.
On the other hand, the Sigma 90mm F2.8 DG DN C is a prime lens with fixed focal lenght of 90mm.
