The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 100-400mm F5-6.3 DG OS HSM and the Nikon 80-400mm f4.5-5.6D ED VR 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 Nikon 80-400mm f4.5-5.6D ED VR with a length of 171mm, is 11mm shorter. On the other hand, the Nikon 80-400mm f4.5-5.6D ED VR has a larger diameter of 91mm compared to the Sigma 100-400mm F5-6.3 DG OS HSM's 86mm 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. Sigma 100-400mm F5-6.3 DG OS HSM weighs 1160g, which means it is 180g (13%) lighter than the Nikon 80-400mm f4.5-5.6D ED VR which has a weight of 1340g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Nikon F (FX) Mount for size comparison purposes.
Super Telephoto Lenses in Nikon F (FX) Mount for Size Comparison
Filter Threads
The Sigma 100-400mm F5-6.3 DG OS HSM has a filter size of 67mm whereas the Nikon 80-400mm f4.5-5.6D ED VR has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Sigma 100-400mm F5-6.3 DG OS HSM:
And these are the 77mm filters that we recommend for the Nikon 80-400mm f4.5-5.6D ED VR:
Lens Mounts
Both the Sigma 100-400mm F5-6.3 DG OS HSM and the Nikon 80-400mm f4.5-5.6D ED VR has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Sigma 100-400mm F5-6.3 DG OS HSM is also available in Sigma SA and Canon EF mounts.
Focal Range
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.
On the other hand, the Nikon 80-400mm f4.5-5.6D ED VR has a focal range of 80-400mm and 5.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 120 - 600mm.