The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon AF-P DX 70-300mm F4.5-6.3G 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 AF-P DX 70-300mm F4.5-6.3G is the longer of the two lenses at 125mm. The Sigma 18-300 F3.5-6.3 DC OS HSM with a length of 102mm, is 23mm shorter. On the other hand, the Sigma 18-300 F3.5-6.3 DC OS HSM has a larger diameter of 79mm compared to the Nikon AF-P DX 70-300mm F4.5-6.3G's 72mm 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 AF-P DX 70-300mm F4.5-6.3G weighs 400g, which means it is 185g (31%) lighter than the Sigma 18-300 F3.5-6.3 DC OS HSM which has a weight of 585g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Nikon F (DX) Mount for size comparison purposes.
Super Telephoto Lenses in Nikon F (DX) Mount for Size Comparison
Filter Threads
The Nikon AF-P DX 70-300mm F4.5-6.3G has a filter size of 58mm 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 58mm filters that we recommend you to consider for the Nikon AF-P DX 70-300mm F4.5-6.3G:
And these are the 72mm filters that we recommend for the Sigma 18-300 F3.5-6.3 DC OS HSM:
Lens Mounts
Both the Nikon AF-P DX 70-300mm F4.5-6.3G and the Sigma 18-300 F3.5-6.3 DC OS HSM has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Sigma 18-300 F3.5-6.3 DC OS HSM is also available in Canon EF , Pentax KAF3, Sigma SA and Sony Alpha mounts.
Focal Range
Nikon AF-P DX 70-300mm F4.5-6.3G has a focal range of 70-300mm and
4.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
105-450mm when used on a APS-C / DX format camera.
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.
