The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 8-16mm F2.8 R LM WR and the Nikon AF-S Fisheye 8-15mm F3.5-4.5 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 XF 8-16mm F2.8 R LM WR is the longer of the two lenses at 122mm. The Nikon AF-S Fisheye 8-15mm F3.5-4.5 with a length of 83mm, is 39mm shorter. Besides being longer, the Fujifilm XF 8-16mm F2.8 R LM WR also has a larger diameter of 88mm compared to the Nikon AF-S Fisheye 8-15mm F3.5-4.5's 78mm diameter.
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Below you can find a scaled side-by-side image of Fujifilm XF 8-16mm F2.8 R LM WR and Nikon AF-S Fisheye 8-15mm F3.5-4.5 to get a better idea of how their sizes compare in real life.
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. Nikon AF-S Fisheye 8-15mm F3.5-4.5 weighs 485g, 39% (320g) lighter than the Fujifilm XF 8-16mm F2.8 R LM WR's weight of 805g.
Lens Mounts
The Fujifilm XF 8-16mm F2.8 R LM WR has the Fujifilm X lens mount whereas the Nikon AF-S Fisheye 8-15mm F3.5-4.5 has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-S20, Fujifilm X-T5 and Fujifilm X-H2 for the Fujifilm X Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Focal Range
Fujifilm XF 8-16mm F2.8 R LM WR has a focal range of 8-16mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
12-24mm when used on a APS-C / DX format camera.
On the other hand, the Nikon AF-S Fisheye 8-15mm F3.5-4.5 has a focal range of 8-15mm and 1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 12 - 22.5mm.