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 Samyang 85mm F1.8 ED UMC CS 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 X is the longer of the two lenses at 102mm. The Samyang 85mm F1.8 ED UMC CS with a length of 81mm, is 21mm shorter. Besides being longer, the Sirui 85mm F1.4 X also has a larger diameter of 80mm compared to the Samyang 85mm F1.8 ED UMC CS's 68mm 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. Samyang 85mm F1.8 ED UMC CS weighs 344g, 36% (196g) lighter than the Sirui 85mm F1.4 X's weight of 540g.
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 Sirui 85mm F1.4 X has a filter size of 67mm whereas the Samyang 85mm F1.8 ED UMC CS has a 62mm 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 62mm filters that we recommend for the Samyang 85mm F1.8 ED UMC CS:
Lens Mounts
Both the Sirui 85mm F1.4 X and the Samyang 85mm F1.8 ED UMC CS 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.
Samyang 85mm F1.8 ED UMC CS is also available in Canon EF-M and Sony E mounts.
Focal Range
Both lenses have the same focal range of
85mm but while Sirui 85mm F1.4 X has the fastest aperture of
F1.4, the Samyang 85mm F1.8 ED UMC CS's widest aperture value is
F1.8.
