The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina 16-28mm f2.8 Pro FX and the Sigma 12-24mm F4.5-5.6 II DG 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. Tokina 16-28mm f2.8 Pro FX is the longer of the two lenses at 133mm. The Sigma 12-24mm F4.5-5.6 II DG HSM with a length of 120mm, is 13mm shorter. Besides being longer, the Tokina 16-28mm f2.8 Pro FX also has a larger diameter of 90mm compared to the Sigma 12-24mm F4.5-5.6 II DG HSM's 87mm 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 12-24mm F4.5-5.6 II DG HSM weighs 670g, 29% (280g) lighter than the Tokina 16-28mm f2.8 Pro FX's weight of 950g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Nikon F (FX) Mount for size comparison purposes.
Ultra-Wideangle Lenses in Nikon F (FX) Mount for Size Comparison
Lens Mounts
Both the Tokina 16-28mm f2.8 Pro FX and the Sigma 12-24mm F4.5-5.6 II DG HSM 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.
Tokina 16-28mm f2.8 Pro FX is also available in Canon EF mount.
Sigma 12-24mm F4.5-5.6 II DG HSM is also available in Canon EF and Sigma SA mounts.
Focal Range
Tokina 16-28mm f2.8 Pro FX has a focal range of 16-28mm and
1.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
24 - 42mm.
On the other hand, the Sigma 12-24mm F4.5-5.6 II DG HSM has a focal range of 12-24mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 18 - 36mm.