The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sirui 85mm F1.4 X and the Fujifilm Fujinon MKX 50-135mm T2.9 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. Fujifilm Fujinon MKX 50-135mm T2.9 is the longer of the two lenses at 207mm. The Sirui 85mm F1.4 X with a length of 102mm, is 105mm shorter. Besides being longer, the Fujifilm Fujinon MKX 50-135mm T2.9 also has a larger diameter of 87mm compared to the Sirui 85mm F1.4 X's 80mm 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 X weighs 540g, which means it is 540g (50%) lighter than the Fujifilm Fujinon MKX 50-135mm T2.9 which has a weight of 1080g.
Filter Threads
The Sirui 85mm F1.4 X has a filter size of 67mm whereas the Fujifilm Fujinon MKX 50-135mm T2.9 has a 82mm 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 Sirui 85mm F1.4 X:
And these are the 82mm filters that we recommend for the Fujifilm Fujinon MKX 50-135mm T2.9:
Lens Mounts
Both the Sirui 85mm F1.4 X and the Fujifilm Fujinon MKX 50-135mm T2.9 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.
Focal Range
Sirui 85mm F1.4 X is a prime lens with fixed focal lenght of 85mm which has an effective (full-frame 35mm equivalent) focal range of
127.5mm when used on a 35mm FF format camera.
On the other hand, the Fujifilm Fujinon MKX 50-135mm T2.9 has a focal range of 50-135mm and 2.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-202.5mm when used on a 35mm FF format camera.
