The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 85mm F1.4 EF and the Sigma 105mm F2.8 EX DG Macro 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 Macro is the longer of the two lenses at 98mm. The Samyang AF 85mm F1.4 EF with a length of 72mm, is 26mm shorter. Besides being longer, the Sigma 105mm F2.8 EX DG Macro also has a larger diameter of 74mm compared to the Samyang AF 85mm F1.4 EF's 61mm 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 105mm F2.8 EX DG Macro weighs 460g, 5% (25g) lighter than the Samyang AF 85mm F1.4 EF's weight of 485g.
Filter Threads
The Samyang AF 85mm F1.4 EF has a filter size of 77mm whereas the Sigma 105mm F2.8 EX DG Macro 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 77mm filters that we recommend you to consider for the Samyang AF 85mm F1.4 EF:
And these are the 62mm filters that we recommend for the Sigma 105mm F2.8 EX DG Macro:
Lens Mounts
Both the Samyang AF 85mm F1.4 EF and the Sigma 105mm F2.8 EX DG Macro has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Sigma 105mm F2.8 EX DG Macro is also available in Nikon F (FX) , Pentax KAF, Sony Alpha, Sigma SA and Four Thirds mounts.
Focal Range
Samyang AF 85mm F1.4 EF is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
136mm.
On the other hand, the Sigma 105mm F2.8 EX DG Macro is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 168mm.