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 Sirui 85mm F1.4 Z 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. Sirui 85mm F1.4 Z is the longer of the two lenses at 102mm. The Viltrox AF 56mm F1.2 Pro with a length of 92mm, is 10mm shorter. Besides being longer, the Sirui 85mm F1.4 Z also has a larger diameter of 80mm compared to the Viltrox AF 56mm F1.2 Pro's 78mm 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. Sirui 85mm F1.4 Z weighs 540g, 5% (30g) lighter than the Viltrox AF 56mm F1.2 Pro's weight of 570g.
Filter Threads
Both the Viltrox AF 56mm F1.2 Pro and the Sirui 85mm F1.4 Z 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
The Viltrox AF 56mm F1.2 Pro has the Sony E lens mount whereas the Sirui 85mm F1.4 Z has the Nikon Z lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount.
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 Sirui 85mm F1.4 Z 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.
