The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Rokinon 85mm F1.8 and the Fujifilm 55-200mm F3.5-4.8 R LM OIS 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 55-200mm F3.5-4.8 R LM OIS is the longer of the two lenses at 118mm. The Rokinon 85mm F1.8 with a length of 81mm, is 37mm shorter. Besides being longer, the Fujifilm 55-200mm F3.5-4.8 R LM OIS also has a larger diameter of 75mm compared to the Rokinon 85mm F1.8'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. Rokinon 85mm F1.8 weighs 344g, which means it is 236g (40%) lighter than the Fujifilm 55-200mm F3.5-4.8 R LM OIS which has a weight of 580g.
Filter Threads
Both the Rokinon 85mm F1.8 and the Fujifilm 55-200mm F3.5-4.8 R LM OIS have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Rokinon 85mm F1.8 and the Fujifilm 55-200mm F3.5-4.8 R LM OIS 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.
Rokinon 85mm F1.8 is also available in the Canon EF-M and Sony E mounts.
Focal Range
Rokinon 85mm F1.8 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 APS-C / DX format camera.
On the other hand, the Fujifilm 55-200mm F3.5-4.8 R LM OIS has a focal range of 55-200mm and 3.6X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 82.5-300mm when used on a APS-C / DX format camera.