The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 70-300 F4-5.6 R and the Sigma 100-400mm F5-6.3 DG OS HSM 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. Sigma 100-400mm F5-6.3 DG OS HSM is the longer of the two lenses at 182mm. The Fujifilm XF 70-300 F4-5.6 R with a length of 133mm, is 49mm shorter. Besides being longer, the Sigma 100-400mm F5-6.3 DG OS HSM also has a larger diameter of 86mm compared to the Fujifilm XF 70-300 F4-5.6 R's 75mm 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. Fujifilm XF 70-300 F4-5.6 R weighs 580g, which means it is 580g (50%) lighter than the Sigma 100-400mm F5-6.3 DG OS HSM which has a weight of 1160g.
Filter Threads
Both the Fujifilm XF 70-300 F4-5.6 R and the Sigma 100-400mm F5-6.3 DG OS HSM have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Fujifilm XF 70-300 F4-5.6 R has the Fujifilm X lens mount whereas the Sigma 100-400mm F5-6.3 DG OS HSM has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Sigma 100-400mm F5-6.3 DG OS HSM is also available in Sigma SA and Canon EF mounts.
Focal Range
Fujifilm XF 70-300 F4-5.6 R has a focal range of 70-300mm and
4.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
105-450mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 100-400mm F5-6.3 DG OS HSM has a focal range of 100-400mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150 - 600mm.
