The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon 24-120mm f4G ED VR and the Sigma 24-105mm F4 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 24-105mm F4 DG OS HSM is the longer of the two lenses at 109mm. The Nikon 24-120mm f4G ED VR with a length of 104mm, is 5mm shorter. Besides being longer, the Sigma 24-105mm F4 DG OS HSM also has a larger diameter of 89mm compared to the Nikon 24-120mm f4G ED VR's 84mm 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 24-120mm f4G ED VR weighs 710g, which means it is 175g (19%) lighter than the Sigma 24-105mm F4 DG OS HSM which has a weight of 885g.
Filter Threads
The Nikon 24-120mm f4G ED VR has a filter size of 77mm whereas the Sigma 24-105mm F4 DG OS HSM has a 82mm 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 24-120mm f4G ED VR:
And these are the 82mm filters that we recommend for the Sigma 24-105mm F4 DG OS HSM:
Lens Mounts
The Nikon 24-120mm f4G ED VR has the Nikon F (FX) lens mount whereas the Sigma 24-105mm F4 DG OS HSM has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 24-105mm F4 DG OS HSM is also available in Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
Nikon 24-120mm f4G ED VR has a focal range of 24-120mm 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
36 - 180mm.
On the other hand, the Sigma 24-105mm F4 DG OS HSM has a focal range of 24-105mm and 4.4X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36 - 157.5mm.
