The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina atx-i 100mm F2.8 FF Macro and the Sigma 105mm F2.8 EX DG OS HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sigma 105mm F2.8 EX DG OS HSM is the longer of the two lenses at 127mm. The Tokina atx-i 100mm F2.8 FF Macro with a length of 95mm, is 32mm shorter. Besides being longer, the Sigma 105mm F2.8 EX DG OS HSM also has a larger diameter of 78mm compared to the Tokina atx-i 100mm F2.8 FF Macro's 73mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Tokina atx-i 100mm F2.8 FF Macro weighs 530g, which means it is 196g (26%) lighter than the Sigma 105mm F2.8 EX DG OS HSM which has a weight of 726g.
Below you can find the dimension and weight table of the Macro Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Macro Prime Lenses in Nikon F (FX) Mount for Size Comparison
Lens Mounts
Both the Tokina atx-i 100mm F2.8 FF Macro and the Sigma 105mm F2.8 EX DG OS 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 atx-i 100mm F2.8 FF Macro is also available in Canon EF , Canon EF and Nikon F (FX) mounts.
Sigma 105mm F2.8 EX DG OS HSM is also available in Canon EF and Sigma SA mounts.
Focal Range
Tokina atx-i 100mm F2.8 FF Macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150mm.
Sigma 105mm F2.8 EX DG OS HSM is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 157.5mm.