The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon Z 100-400mm F4.5-5.6 VR and the Sigma 50-500mm F4.5-6.3 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. Nikon Z 100-400mm F4.5-5.6 VR is the longer of the two lenses at 222mm. The Sigma 50-500mm F4.5-6.3 DG OS HSM with a length of 219mm, is 3mm shorter. On the other hand, the Sigma 50-500mm F4.5-6.3 DG OS HSM has a larger diameter of 104mm compared to the Nikon Z 100-400mm F4.5-5.6 VR's 98mm 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. Nikon Z 100-400mm F4.5-5.6 VR weighs 1435g, which means it is 535g (27%) lighter than the Sigma 50-500mm F4.5-6.3 DG OS HSM which has a weight of 1970g.
Filter Threads
The Nikon Z 100-400mm F4.5-5.6 VR has a filter size of 77mm whereas the Sigma 50-500mm F4.5-6.3 DG OS HSM has a 95mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Nikon Z 100-400mm F4.5-5.6 VR:
And these are the 95mm filters that we recommend for the Sigma 50-500mm F4.5-6.3 DG OS HSM:
Lens Mounts
The Nikon Z 100-400mm F4.5-5.6 VR has the Nikon Z lens mount whereas the Sigma 50-500mm F4.5-6.3 DG OS HSM has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Sigma 50-500mm F4.5-6.3 DG OS HSM is also available in Canon EF , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Nikon Z 100-400mm F4.5-5.6 VR 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.
On the other hand, the Sigma 50-500mm F4.5-6.3 DG OS HSM has a focal range of 50-500mm and 10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75 - 750mm.