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 Kase 85mm F1.4 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. Kase 85mm F1.4 is the longer of the two lenses at 99mm. The Viltrox AF 56mm F1.2 Pro with a length of 92mm, is 7mm shorter. Besides being longer, the Kase 85mm F1.4 also has a larger diameter of 82mm 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. Viltrox AF 56mm F1.2 Pro weighs 570g, which means it is 10g (1%) lighter than the Kase 85mm F1.4 which has a weight of 580g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Fujifilm X Mount for size comparison purposes.
Telephoto Lenses in Fujifilm X Mount for Size Comparison
Filter Threads
The Viltrox AF 56mm F1.2 Pro has a filter size of 67mm whereas the Kase 85mm F1.4 has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Viltrox AF 56mm F1.2 Pro:
And these are the 72mm filters that we recommend for the Kase 85mm F1.4:
Lens Mounts
Both the Viltrox AF 56mm F1.2 Pro and the Kase 85mm F1.4 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
Viltrox AF 56mm F1.2 Pro is also available in the Sony E and Nikon Z mounts.
Kase 85mm F1.4 is also available in Sony E , Nikon Z and Leica L 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 Kase 85mm F1.4 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.
