The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox AF 56mm F1.2 Pro and the Sony FE 85mm F1.8 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 56mm F1.2 Pro is the longer of the two lenses at 92mm. The Sony FE 85mm F1.8 with a length of 82mm, is 10mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 78mm.
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. Sony FE 85mm F1.8 weighs 371g, 34% (199g) lighter than the Viltrox AF 56mm F1.2 Pro's weight of 570g.
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
Both the Viltrox AF 56mm F1.2 Pro and the Sony FE 85mm F1.8 have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Viltrox AF 56mm F1.2 Pro and the Sony FE 85mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Viltrox AF 56mm F1.2 Pro is also available in the Fujifilm X and Nikon Z mounts.
Focal Range
Viltrox AF 56mm F1.2 Pro 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.
On the other hand, the Sony FE 85mm F1.8 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.