The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tokina 100mm f2.8 Macro and the Sigma 105mm F2.8 EX DG OS HSM for their suitability to various photography scenarios:
Size and Weight Comparison
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 100mm f2.8 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 Tokina 100mm f2.8 Macro's 73mm diameter.
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 100mm f2.8 Macro weighs 540g, which means it is 186g (25%) 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 Tokina 100mm f2.8 Macro and 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 100mm f2.8 Macro is also available in Canon EF mount.
Sigma 105mm F2.8 EX DG OS HSM is also available in Canon EF and Sigma SA mounts.
Focal Range
Tokina 100mm f2.8 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 an 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 an 35mm (FF) equivalent of 157.5mm.