The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 18-300 F3.5-6.3 DC OS HSM and the Tokina 80-400mm f4.5-5.6 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. Tokina 80-400mm f4.5-5.6 is the longer of the two lenses at 137mm. The Sigma 18-300 F3.5-6.3 DC OS HSM with a length of 102mm, is 35mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 79mm.
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, which means it is 435g (42%) lighter than the Tokina 80-400mm f4.5-5.6 which has a weight of 1020g.
Filter Threads
Both the Sigma 18-300 F3.5-6.3 DC OS HSM and the Tokina 80-400mm f4.5-5.6 have the same Filter thread size of 72mm.
Below are links to the 72mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Sigma 18-300 F3.5-6.3 DC OS HSM has the Nikon F (DX) lens mount whereas the Tokina 80-400mm f4.5-5.6 has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Sigma 18-300 F3.5-6.3 DC OS HSM is also available in the Canon EF , Pentax KAF3, Sigma SA and Sony Alpha mounts.
Tokina 80-400mm f4.5-5.6 is also available in Canon EF mount.
Focal Range
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.
On the other hand, the Tokina 80-400mm f4.5-5.6 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.
