The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 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
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 105mm F2.8 EX DG OS HSM is the longer of the two lenses at 127mm. The Samyang 100mm F2.8 Macro with a length of 123mm, is 4mm shorter. Besides being longer, the Sigma 105mm F2.8 EX DG OS HSM also has a larger diameter of 78mm compared to the Samyang 100mm F2.8 Macro's 73mm 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. Samyang 100mm F2.8 Macro weighs 720g, which means it is 6g (0%) 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 Telephoto Macro Lenses in Nikon F (FX) Mount for size comparison purposes.
Macro Lenses in Nikon F (FX) Mount for Size Comparison
Filter Threads
The Samyang 100mm F2.8 Macro has a filter size of 67mm whereas the Sigma 105mm F2.8 EX DG OS HSM has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Samyang 100mm F2.8 Macro:
And these are the 62mm filters that we recommend for the Sigma 105mm F2.8 EX DG OS HSM:
Lens Mounts
Both the Samyang 100mm F2.8 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.
Samyang 100mm F2.8 Macro is also available in Canon EF , Fujifilm X, Micro Four Thirds, Pentax KAF, Samsung NX, Sony Alpha and Sony E mounts.
Sigma 105mm F2.8 EX DG OS HSM is also available in Canon EF and Sigma SA mounts.
Focal Range
Samyang 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 a 35mm (FF) equivalent of
150mm.
On the other hand, the 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.