The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon Z 28-400mm F4-8 VR and the Sigma 18-300 F3.5-6.3 DC 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 28-400mm F4-8 VR is the longer of the two lenses at 142mm. The Sigma 18-300 F3.5-6.3 DC OS HSM with a length of 102mm, is 40mm shorter. Besides being longer, the Nikon Z 28-400mm F4-8 VR also has a larger diameter of 85mm compared to the Sigma 18-300 F3.5-6.3 DC OS HSM's 79mm diameter.
Below you can find a scaled side-by-side image of Nikon Z 28-400mm F4-8 VR and Sigma 18-300 F3.5-6.3 DC OS HSM to get a better idea of how their sizes compare in real life.
Comparison image of the Nikon Z 28-400mm F4-8 VR and the Sigma 18-300 F3.5-6.3 DC OS HSM Size and Weight 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 18-300 F3.5-6.3 DC OS HSM weighs 585g, 19% (140g) lighter than the Nikon Z 28-400mm F4-8 VR's weight of 725g.
Filter Threads
The Nikon Z 28-400mm F4-8 VR has a filter size of 77mm whereas the Sigma 18-300 F3.5-6.3 DC OS HSM has a 72mm 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 28-400mm F4-8 VR:
And these are the 72mm filters that we recommend for the Sigma 18-300 F3.5-6.3 DC OS HSM:
Lens Mounts
The Nikon Z 28-400mm F4-8 VR has the Nikon Z lens mount whereas the Sigma 18-300 F3.5-6.3 DC OS HSM has the Nikon F (DX) 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 D3500 , Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Canon EF , Pentax KAF3 , Sigma SA and Sony Alpha mounts.
Focal Range
Nikon Z 28-400mm F4-8 VR has a focal range of 28-400mm and
14.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 600mm .
On the other hand, the Sigma 18-300 F3.5-6.3 DC OS HSM has a focal range of 18-300mm and 16.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-450mm when used on a APS-C / DX format camera.
