The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 150-600mm F5.6-8 R and the Sigma 500mm F4 DG OS HSM Sport 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 500mm F4 DG OS HSM Sport is the longer of the two lenses at 380mm. The Fujifilm XF 150-600mm F5.6-8 R with a length of 315mm, is 65mm shorter. Besides being longer, the Sigma 500mm F4 DG OS HSM Sport also has a larger diameter of 145mm compared to the Fujifilm XF 150-600mm F5.6-8 R's 99mm 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 150-600mm F5.6-8 R weighs 1605g, which means it is 1705g (51%) lighter than the Sigma 500mm F4 DG OS HSM Sport which has a weight of 3310g.
Filter Threads
The Fujifilm XF 150-600mm F5.6-8 R has a filter size of 82mm whereas the Sigma 500mm F4 DG OS HSM Sport has a 46mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Fujifilm XF 150-600mm F5.6-8 R:
And these are the 46mm filters that we recommend for the Sigma 500mm F4 DG OS HSM Sport:
Lens Mounts
The Fujifilm XF 150-600mm F5.6-8 R has the Fujifilm X lens mount whereas the Sigma 500mm F4 DG OS HSM Sport 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 500mm F4 DG OS HSM Sport is also available in Sigma SA and Canon EF mounts.
Focal Range
Fujifilm XF 150-600mm F5.6-8 R has a focal range of 150-600mm and
4.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
225-900mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 500mm F4 DG OS HSM Sport is a prime lens with fixed focal lenght of 500mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 750mm.