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 8mm F3.5 EX DG Fisheye 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 8mm F3.5 EX DG Fisheye with a length of 69mm, is 7mm shorter. On the other hand, the Sigma 8mm F3.5 EX DG Fisheye has a larger diameter of 74mm compared to the Viltrox 85mm F2.0's 69mm 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 85mm F2.0 weighs 360g, which means it is 40g (9%) lighter than the Sigma 8mm F3.5 EX DG Fisheye which has a weight of 400g.
Lens Mounts
The Viltrox 85mm F2.0 has the Nikon Z lens mount whereas the Sigma 8mm F3.5 EX DG Fisheye has the Sigma SA lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill for the Sigma SA Mount.
Viltrox 85mm F2.0 is also available in the Sony E mount.
Sigma 8mm F3.5 EX DG Fisheye is also available in Canon EF and Nikon F (FX) mounts.
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 8mm F3.5 EX DG Fisheye is a prime lens with fixed focal lenght of 8mm.
